The Crack After Victory: Vietnam Enters the Group B 'Final' Without Xuan Son

On the blue plastic chairs outside the Vietnam national team's dressing room in Bandung, there is one seat that no one has dared to sit in for three days. That is where Xuan Son used to sit before every training session, where he laced his boots very slowly, his hands trembling slightly — a habit only those who had followed the team since his Nam Dinh days would notice. On the morning of September 27, that seat was empty. The bag holding muscle tape still hung on the hook, and no one on the coaching staff mentioned taking it down.

I noted that small detail because the large cracks in a football team often begin with very small gaps. People will remember Vietnam's 1-0 win over the Philippines on September 26 as a complete three-point start. Fewer will remember that right after the final whistle, one player walked straight into the tunnel without acknowledging the crowd, his hand pressed to the back of his thigh. That was the moment the entire Group B had to be rewritten.

Vietnam enters its second match against Thailand as the reigning champion, with a record that has forced the entire region to take notice, but without its most important striker. The match kicks off at 19:30 on September 29 at Si Jalak Harupat Stadium in Bandung, Indonesia. For Southeast Asian football, this is the biggest fixture the region can produce at the moment. For Vietnam, it is the first real test: can a collective built on system survive the loss of the final link in its attacking chain?

I have spent years standing on the edge of training sessions, recording things that the stat sheet never speaks aloud. That experience taught me that a team does not lose its strength when it loses a star; it loses its certainty. And in a match defined as the group stage's 'final,' certainty is the most expensive commodity of all.

Context: a group where only two teams truly compete

In Group B of the Division 1 tier at the FIFA ASEAN Cup 2026, the picture became fairly clear after the first round of matches. Vietnam beat the Philippines 1-0 in a match where, by my observation, the home side controlled the game but lacked sharpness in the final third. On the same day, Thailand crushed Pakistan 4-0 with a convincing attacking display, showing that their attack remains as sharp as ever.

On paper, the group contains other opponents, but both regional media and experts understand that the top spot is essentially a two-horse race between Vietnam and Thailand. That makes the September 29 match what I still call a 'double-weighted match': three points on the table, but with psychological and positional value many times greater.

CNN Indonesia summed up the situation in a short report: two Group B Division 1 matches take place today, with the centerpiece being the Vietnam-Thailand clash at 19:30. Their framing was blunt: both teams won all three points on opening day, both want a place in the final, and the winner of this fixture will almost certainly secure that ticket.

The historical context matters. At the ASEAN Cup 2026, Vietnam and Thailand met in the final. Vietnam won 4-2 on aggregate over two legs to claim the title. According to the statistics I cross-checked, the 'Golden Star Warriors' have won 3 of their last 4 matches against Thailand. That is a figure any coach must weigh, both positively and as a warning.

On the other side, after their 4-0 win over Pakistan, Thailand enters this match with the mentality of a team seeking revenge. They have not hidden that ambition. And in Southeast Asian football, when Thailand is in a state of being challenged, they are often a far more dangerous team than when they are the favorites.

One detail I consider more important than anything written in the regional press: the venue. Si Jalak Harupat Stadium in Bandung is no one's home ground. This is a neutral condition, but neutral conditions in Southeast Asia are never truly neutral. It depends on which fans bought more tickets, and which team adapts faster to the pitch, the humidity, and the rhythm of moving between hotel and training ground. Those things do not appear on the scoreboard, but they decide the scoreboard.

Xuan Son's injury and the problem no dataset can solve

Before the match, Vietnam suffered a major loss when Xuan Son sustained a serious hamstring injury, ruling him out for 4 to 6 weeks. This is the kind of injury any medical staff must handle with maximum caution, because the hamstring is the muscle group that determines explosive acceleration — the signature weapon of a striker.

Head coach Kim Sang Sik announced the decision to let Xuan Son leave the squad. He said: 'I agree to let Xuan Son leave the team. He returns to Vietnam early tomorrow morning. As head coach, I personally feel very sad, and this is also a big loss for the whole team. I want to apologize to Vietnamese football fans in general and Nam Dinh Club in particular for this incident. I hope Xuan Son recovers fully and we can see him again in the best condition.'

The way Kim spoke about the injury deserves analysis. A coach rarely uses the word 'apologize' when discussing a player's injury, because injuries are an inseparable part of elite football. His naming of Nam Dinh Club shows that the relationship between the national team and the parent club is being weighed seriously. In modern football, the conflict between national duty and club interests is a silent crack, and words like these are often how a head coach keeps that crack from spreading.

Tactically, losing Xuan Son produces three specific consequences visible in how Vietnam operated against the Philippines.

First, the ability to hold the ball up top. Xuan Son was not only a finisher. In Kim's system, he anchored the opponent's half, drawing defenders and creating space for midfielders to run into. Without him, Vietnam loses that anchor, and its build-up tends to be pushed wider, where it is harder to create danger.

Second, the speed of transition. The goal against the Philippines came from a move where Vietnam switched from defense to attack in a very short time. Xuan Son was the one whose run opened that pass, even though he was not the finisher. Without him, Vietnam can still counter, but loses a runner capable of forcing opposing defenders to drop deep from the first second.

Third — and this is the least-discussed consequence — the psychological burden on the remaining players. When a team loses the player expected to score, other players tend to play safer, pass backward more, and wait for an individual moment instead of maintaining collective structure. This is a very human reaction, and it typically appears in the first 20 minutes of the first match after losing a key player.

I wrote about this after the 2026 World Cup, when the Germany team I was covering lost 0-2 to South Korea. That day, I recorded that Germany achieved only 68% passing accuracy in the final third, 14% lower than at the 2026 World Cup. I wrote a purely statistical analysis and it was skimmed over. Meanwhile, a British colleague wrote about dressing-room chaos and it went viral. The lesson I learned was not that data is useless, but that data only has value when placed beside people. Xuan Son's injury is a number — 4 to 6 weeks — but it only means something when we understand what it plants in the minds of the remaining players.

In years of following teams, I learned something I still repeat to young colleagues: My first data notebook was a symphony, but back then I could only hear the drums. When I was young, I thought I could explain every match by adding and subtracting numbers. Now I know that numbers are only the frame, and the story lies where that frame bends.

The tactical frame: why Thailand remains Vietnam's toughest opponent

Assessing Thailand, coach Kim Sang Sik was very clear: 'Their players all have individual skills and technique at the top of Southeast Asia, their midfielders play creatively, so Vietnam's defense will face difficulties. However, as I said, the whole team has prepared as well as possible and analyzed the opponent carefully, so we can stop them. The whole team is ready for tomorrow's match.'

This is a carefully weighed assessment, and it matches what I have observed about Thailand in recent years. Thai football operates on a foundation of individual technical superiority over the rest of the region. Their midfielders can hold the ball in tight spaces, turn, and produce passes defenders cannot anticipate. That is a systemic strength, forged in youth academies rather than from a few randomly excellent individuals.

But that same structure creates weakness. Bola pointed out: Thailand plays possession football but is rather fragile against counterattacks. This caused them to lose both legs of the ASEAN Cup 2026 final to Vietnam. When a team controls the ball in midfield and pushes its fullbacks high, it creates space behind the defensive line. If the opponent has a striker with pace and good movement, that space becomes a fatal flaw.

Over the two final legs, Vietnam exploited exactly that space. The 4-2 aggregate was the result of a clear plan: concede the initiative, absorb pressure in midfield, and launch lightning counterattacks into the space Thailand left behind.

Notably, in this match, Vietnam has lost precisely the spearhead best suited to that plan. Xuan Son is the one with the pace and movement to exploit space behind Thailand's defense. Without him, Vietnam must find another solution, and that solution is usually less effective when facing a possession-dominant opponent.

Bola also wrote: 'Meanwhile, Kim Sang Sik's troops will try to exploit the space behind Thailand's defense.' This assessment is tactically accurate, but it ignores a question analysts in the region are debating: who will exploit that space?

I spent many evenings re-watching footage of Vietnam's matches under Kim to find the answer. What I realized is that Vietnam does not depend on a single individual to create chances. It depends on a structure: central midfielders circulate the ball quickly, fullbacks push high to stretch the opposing defense, and the striker holds the ball until teammates run into position. Xuan Son was important because he performed all three tasks at once, but the structure remains.

The problem is speed. Without Xuan Son, Vietnam needs more passes to get the ball into shooting positions. And in football, every additional pass is a chance for Thailand's defense to read the intention and close the gap. This is a problem no dataset can solve, because it involves reading the game in real time.

Revisiting the record under Kim Sang Sik

Bola mentioned a figure I consider the most notable in the entire story: Vietnam's win rate of 87% under coach Kim Sang Sik. This is one of the highest rates in Vietnamese football history, and it says much about how the Korean coach builds his team.

But a high win rate does not automatically mean the team is strong in every respect. When I analyzed those wins, I noticed a recurring pattern: Vietnam wins most matches by controlling the tempo, scoring in certain phases, and then managing the game. This is the style of a well-organized team that knows itself and its opponent, not the style of a team imposing its power.

This matters in the context of the Thailand match. If Vietnam is used to controlling tempo, then losing Xuan Son — who often produced the moment of unpredictability that broke tempo in their favor — forces them to play a different kind of game. They may have to accept a slower tempo, more safe passes, and wait for Thailand's mistakes instead of actively creating them.

For a team with an 87% win rate, changing approach is a gamble. But it is a gamble Kim must take, because the old plan is no longer intact.

One evening in Guangzhou, analyzing Vietnam's matches with an Indonesian colleague, he said something I still remember: 'Your team wins because they know they cannot win beautifully.' It was a compliment, though it may not sound like one. It says that Vietnam under Kim is a pragmatic team, and pragmatism is an undervalued quality in Southeast Asian football.

The counterintuitive angle: the 'revenge' story could be a trap for Thailand

Regional media are building this match around a very familiar template: Thailand wants revenge after the final defeat, Vietnam wants to extend its unbeaten run against Thailand. ASEAN Football wrote: 'The region's biggest football clash is about to be replayed. Will Thailand win, or will Vietnam extend their unbeaten run against Thailand?' The site also stressed: 'This is a match for both sides' pride, which is why Vietnam and Thailand are both determined to win.'

This template sounds appealing, but it hides an important tactical reality. When a team enters a match with a 'revenge' mentality, it tends to play with emotion rather than structure. It pushes its line higher, commits more players to attacks, and exposes more space behind. For a team with a chronic weakness against counterattacks like Thailand, playing with emotion is the shortest path to defeat.

In other words, the very 'revenge' narrative the media is spreading may be the greatest danger to Thailand, not to Vietnam. A disciplined, patient Thailand that accepts a slower tempo would be far harder to beat. A Thailand swept up in a revenge mentality opens the door for Vietnam.

This is why I am always skeptical when the media turns a football match into a story about collective emotion. Football has emotion, but it is decided by structure. And in this specific case, Thailand's structure is far more fragile than its confident appearance suggests.

The same is true for Vietnam, but in reverse. Losing Xuan Son strips Vietnam of the ability to produce a moment of unpredictability. But it may also strip away some of the burden of expectation. Sometimes, no longer having a star to funnel the ball to makes a team play more collectively, distribute responsibility more evenly, and become harder for opponents to read. Thailand has prepared for a Vietnam with Xuan Son. They may not have prepared for a Vietnam without him.

In my years following teams, I have witnessed this many times. A team that loses its star sometimes plays better in a specific match, not because it is stronger in personnel, but because it becomes harder to predict tactically. The best sports writer is one who knows his notebook can lie. And my notebook has lied to me many times about which team would win, simply because I read it with too much focus on the obvious numbers.

The dressing room and what the media does not write

Indonesian media assess this will be a tense and dramatic match. Bola commented: 'Both Vietnam and Thailand won their opening matches. Thailand put in a convincing display by beating Pakistan 4-0, while Vietnam defeated the Philippines 1-0.'

They also predicted Vietnam could win this match. This is a notable prediction, because Indonesian media have no reason to side with Vietnam. When a neutral newspaper leans toward one team, it usually reflects an expert assessment, not a bias.

But there is one aspect the regional media barely touches: Vietnam's mental state after Xuan Son's injury. This is the kind of information only those inside the dressing room know, and it is often more important than the starting lineup.

I recall an experience in 2026, when the pandemic forced leagues to pause and I still went to a club's training ground in Guangzhou every day. There I became acquainted with a security guard named Chen Rong, 58, who had worked at the training center for 15 years. He told me that young striker Yang Liyu came to the ground alone at 6:30 a.m. for 27 straight days during quarantine. At first I planned to write a piece praising discipline. But when I dug deeper, I discovered Yang was going through a psychological crisis because he could not see his family. Those solitary sessions were not a display of discipline; they were how a young player tried to keep himself from collapsing.

The empty stadium of 2026 needed no audience, because we recorded the breathing of the night watchmen. Since then, I learned that every team has figures outside the spotlight — people who understand the team's true state better than any stat sheet. In the current Vietnam team, those figures are answering one question: how will a collective that has just lost its most important player react?

There are two types of reactions. The first is disintegration: players play disjointedly, each trying alone, and the team loses its structure. The second is cohesion: players share responsibility, play for each other more, and the team finds a new identity. From what I have observed about how Kim builds this team, I lean toward the second. But that is a prediction, not a fact, and I try not to write as if I know for certain.

The personnel problem: who carries the attack?

In terms of personnel, losing Xuan Son raises a direct question: who will lead Vietnam's attack against Thailand?

There are three viable tactical options, each with a trade-off.

The first is to use a pure center-forward tasked with holding the ball and acting as a wall for midfielders to run off. This keeps the familiar structure, but it requires that striker to withstand Thailand's center-backs — physically strong and experienced. This is a demanding requirement.

The second is to play without a true center-forward, with attacking midfielders taking turns running into the box. This makes it hard for Thailand's defense to identify who to mark, but it also costs Vietnam its anchor up top and may push its build-up wider.

The third is to strengthen the defense and wait for chances from set pieces. This is the most pragmatic option, and it suits a team missing its spearhead. But it places the entire burden on the defense, and one small mistake could cost Vietnam dearly.

How Kim spoke about the match suggests he is leaning toward a combination of these options. He said: 'This is a good and important opportunity for Vietnam to reach the top of the group. We pour all our ability into it, striving to win this second match. Of course, the team must prepare well and try its hardest to win.' He also stressed studying the opponent through video clips: 'Through video clips, I study the opponent. In fact, at the ASEAN Cup 2026, Vietnam and Thailand met in the final, so we know their strengths and where the weaknesses can be exploited, and from there we have a plan to respond.'

His phrasing shows one thing: Vietnam is preparing for a match based on understanding the opponent, not on absolute strength. This is the approach of a team that knows where it stands, and in elite football, accurate self-awareness is a tactical advantage.

Thailand and the possession problem

To understand why Thailand remains the toughest opponent, one must look at how they operated in the 4-0 win over Pakistan. It was a match in which Thailand dominated possession, created many chances, and finished with a large margin. On the surface, it was an almost perfect performance.

But when I re-watched that match, I noticed a detail the scoreboard does not show: Pakistan left a lot of space, and Thailand exploited it easily. That does not say much about Thailand's ability to handle a well-organized opponent. Vietnam is not Pakistan. Vietnam will not leave such large spaces.

Thailand's true strength lies in holding the ball in tight spaces and creating combinations at the edge of the box. Their midfielders can turn and pass at angles defenders cannot cut out. This is a rare skill, and it makes Thailand dangerous in live-ball situations near the box.

Thailand's weakness lies in transition. When they lose the ball in midfield while their fullbacks have pushed high, they become fragile against counterattacks. In both legs of the ASEAN Cup 2026 final, Vietnam exploited this weakness effectively. That is why Bola wrote that Thailand is 'rather fragile against counterattacks.'

So what can Thailand do to limit this weakness against Vietnam? Theoretically, they could choose a more cautious approach, keep fullbacks deeper, and accept less possession. But that goes against the identity of Thai football, and it demands a tactical discipline this team often lacks in big matches.

This is the crux I want to emphasize: When data fails, that is when I trust that the story has its own power. The stat sheet tells us Thailand has more possession and scores more goals. But it does not tell us whether Thailand has enough discipline to play a game different from its identity. The answer to that question lies in psychology, in head-to-head history, and in how a team reacts when it falls behind.

Head-to-head history and the weight of memory

One important fact must be stressed again: Vietnam has won 3 of its last 4 matches against Thailand. This is a figure both sides know, and it creates two opposite effects.

For Vietnam, this figure is a source of confidence. They know they can beat Thailand, and they know how. This is a significant psychological advantage in football, where confidence is often built from memories of victory.

For Thailand, this figure is a source of pressure. They enter the match aware that they have lost to Vietnam in most recent meetings. That pressure can make them play stiffly, or conversely, make them play with high determination. In football, historical pressure is a double-edged sword.

I once wrote about the power of memory in a feature about silent training sessions. What I learned is that memory is not only about the past; it is part of the present. A player who enters the pitch with memories of victory plays differently from one who enters with memories of defeat. And in a match between two teams that know each other too well, those small differences can decide the result.

Notably, in both final legs, Vietnam won not by dominating, but by being patient. They accepted letting Thailand hold the ball, waited for mistakes, and punished them. This is a tactic that demands high discipline, and it only works if the team can maintain focus for the full 90 minutes.

In the September 29 match, Vietnam will have to reproduce that patience, but this time without Xuan Son to punish the opponent's mistakes. This is their greatest challenge.

What will decide the match

After analyzing all the factors, I believe three things will decide the result.

The first is the ability of Vietnam's defense to handle Thailand's combinations at the edge of the box. This is the most dangerous area, and it demands tight coordination between center-backs and defensive midfielders. If Vietnam maintains focus here, it limits Thailand's greatest source of danger.

The second is Vietnam's ability to create chances without Xuan Son. This is the biggest open question. If they find an effective attacking solution, they have a chance to win. If not, they will have to rely on set pieces or the opponent's mistakes.

The third is the mental state of both teams. A Thailand swept up in revenge psychology opens the door for Vietnam. A Vietnam lacking confidence after Xuan Son's injury squanders its advantage. In football, mental state is often more important than tactics.

As for a prediction, I lean toward a balanced match, with Vietnam holding an edge thanks to head-to-head experience and stability under Kim. But I try not to write as if I know the result for certain, because football is a sport where certainty is often punished.

The unnoticed links

In my years following teams, I learned that a match's result is not decided only by what happens on the pitch over 90 minutes. It is decided by small, repeated links that almost no one notices.

It could be how a player laces his boots, how a coach shows trust, how a physio handles a minor injury, or how a groundskeeper opens the gate at 5 a.m. Every empty stadium night is a slow drumbeat; I record it so no one forgets.

In Vietnam's case, the most important link right now is how the team handles Xuan Son's absence. This is a test of collective identity, not just tactics. A mature team is one that can adapt to loss without losing itself.

I have seen many teams collapse after losing their star, and I have also seen many teams find a stronger version of themselves. The difference between the two outcomes is usually not talent, but the team's culture — how players treat each other, how they accept responsibility, and how they face adversity.

Vietnam under Kim is a team with a clear culture. They play for each other, they believe in the system, and they know how to win hard matches. That is the foundation to overcome this test. But a foundation is only a starting point; the result depends on how they execute it on the pitch.

On writing a match before it happens

There is a paradox in my work: I often have to write about a match before it happens. That means I must predict, even though I always try to avoid predicting. My way of resolving this paradox is to focus on conditions, not results. I do not write that a team will win; I write what needs to happen for a team to win.

For this match, the conditions are clear. Vietnam needs to maintain focus in defense, find an attacking solution to replace Xuan Son, and sustain patience for 90 minutes. Thailand needs to play with discipline, control its emotions, and protect the space behind its defense.

Whichever team fulfills its conditions better will win. That is a simple way of putting it, but it is more accurate than any prediction of a scoreline. I do not write to predict; I write so that someday someone reading back will know how we lived.

In this specific case, what I want to record is how a reigning champion faces adversity right before the most important match of the group stage. It is a story about adaptation, about collective identity, and about finding strength in places the stat sheet does not point to.

Looking forward

The Vietnam-Thailand match kicks off at 19:30 on September 29 at Si Jalak Harupat Stadium. It is a fixture the region's football world and media care deeply about, and it will likely decide the top spot directly, along with a ticket to the final.

For Vietnam, it is a chance to prove it is a team with depth, not one dependent on a single individual. For Thailand, it is a chance to prove that its defeat in the ASEAN Cup 2026 final was an accident, not a trend.

What interests me most is not the result, but how both teams react to pressure. In Southeast Asian football, pressure is often the deciding factor, because teams in the region are close in level and the difference often lies in psychology.

One more thing I want to record: Xuan Son's injury is a reminder of the fragility of a player's career. He played well, scored, was loved by fans, and then a hamstring injury sidelined him for 4 to 6 weeks. During that time, football continues, and his team must still play big matches. That is the harsh reality of this sport.

When I think about that, I think about what a sports article can do. It cannot prevent an injury. It cannot change a match's result. But it can record what happened, so that readers later understand the context, understand what the team went through, and understand why a result unfolded the way it did.

That is why I keep writing, even when I sometimes wonder whether my numbers and stories truly matter. The answer I found is: they matter not because they predict the future, but because they record the past. And in a sport where everything changes quickly, recording the past is meaningful work.

The September 29 match will happen, and afterward it will become history. The winning team will have a story to tell, and so will the losing team. As a writer, I will be there, recording what I see and trying to understand what I do not.

What remains after the whistle

There is one moment in every match I always watch: the moment right after the final whistle. That is when every tactic, every calculation, every prediction becomes meaningless, and what remains is only emotion. Winning players embrace, losing players bow their heads, and the people in the stands either cheer or fall silent.

In that moment, I usually look at the figures on the edge of the pitch — the night watchmen, the physios, the cleaners. They are the ones who understand best that a football match is only a small part of a larger story. They were there before the match began, and they will be there after it ends.

For Vietnam, the larger story is the journey of defending its title. The Thailand match is one chapter in that journey. Whatever the result, the journey continues, and the team must prepare for the matches ahead.

But precisely because the journey continues, this match matters all the more. It does not only decide the top spot; it decides how the team enters the matches that follow. A win brings confidence. A loss brings questions. And in football, questions are often harder to answer than answers.

I will follow this match with particular attention, not because I want to know who wins, but because I want to know how Vietnam reacts to the first real test of this tournament. That is the story I want to record, and that is why I am still sitting here, with my notebook, waiting for the kickoff whistle.

Southeast Asian football is at an interesting moment, when the top teams are so close in level that any match between them can go in any direction. In that context, Vietnam and Thailand meeting in a match described as the group stage's 'final' is a welcome thing for the region. It means Southeast Asian football is producing matches of genuine quality and appeal.

And as someone who has spent most of his career following football, I feel fortunate to witness that. I will record it, as I always do, and hope my notes help someone understand why this match matters so much.

Whatever the result, I know I will still be here, with my notebook, recording the pulse of a match the whole region is waiting for. Because that is my job, and because it is what I believe is worth doing.