Kim Sang Sik Returns to South Korea After His Father's Death: The Gap Before the ASEAN Cup and the Pressure No One Mentions

On the night of June 27, 2026, at a stadium in Kazan, I was seventeen years old, squeezing through a packed bar to glue my eyes to the screen. South Korea was leading Germany 1-0. By the 90+6th minute, Son Heung-min sealed a 2-0 victory, turning the reigning world champions into former champions. That night I did not celebrate with the crowd. I rushed home to write the first article of my career. And I learned one thing: in football, what makes people collapse is not technique, but a gap that opens exactly when no one expects it.

This morning I thought about that night again.

The Vietnam Football Federation released a short statement: head coach Kim Sang Sik has temporarily left Vietnam to return to South Korea after his father passed away at age 84, following a long battle with illness. He is expected to stay home for about a week to handle funeral arrangements before returning to lead the national team.

Sounds simple. But if you truly understand football, you know that one week at this moment is not an ordinary week.

Context: A week in the wrong place

Kim Sang Sik was appointed to lead the Vietnam national team in May 2026, succeeding Park Hang Seo in a context where Vietnamese football needed systemic continuity. His resume is not flashy but substantial: he led Jeonbuk Hyundai Motors to multiple K-League titles and served on the South Korean national team's coaching staff. He is the kind of coach I am used to seeing in my home country – men who do not talk much, who do not make noise, but who live inside the pitch like fish in water.

Over the past year-plus, Kim Sang Sik has poured himself into his work. He has guided both the U23 and senior national teams, delivering positive results in regional and continental tournaments. Anyone who has watched the national team's training sessions has seen a man who almost never leaves the pitch. And that is precisely what gives this absence its weight.

According to official announcements, the President of the Vietnam Football Federation sent condolences and encouraged Kim Sang Sik to return home for the funeral. The message read in part: "We hope coach Kim Sang Sik and his family can soon find the strength to overcome this immense loss." This is the proper conduct of an organization that understands the rules of the game. But proper conduct and tactical risk management are two entirely different stories.

On the tournament side, Vietnam sits in Group A of Division 1 for the 2026 ASEAN Cup, alongside Thailand, the Philippines, and Pakistan. The tournament runs from September 24 to October 5. This is a period of compressed emotion: red flags with yellow stars flying across stadiums, fans calculating every point, and every newspaper wanting a headline. In that environment, a one-week absence by the head coach is not a rest – it is a gap marked with an asterisk.

Core analysis: The gap everyone sees but no one measures

Let's start with the simplest thing: time. Southeast Asian national team camps typically compress tactical work into short windows before tournaments. Unlike European national teams with weeks of preparation camps, Southeast Asian sides often have two or three weeks to reassemble their system, fit personnel, and install set-piece routines. Losing one week in that window is not losing one-seventh. It is losing the skeleton.

I have spoken with coaches who work at the national team level. They share something the media rarely writes: pre-tournament tactical sessions are not just about teaching players to run to the right positions. They create collective memory – something that only forms when the whole team repeats the same drills over consecutive days. If the person setting those drills is absent, that memory does not form properly, no matter how good the assistants are.

But there is a point here that Vietnamese media have not exploited. It is the question of coaching staff structure. Kim Sang Sik has a team of Korean assistants alongside him – that is the standard model when appointing a foreign coach. These assistants understand his tactical system, understand his body language, understand how he wants the team to play in each match state. If they are given real authority this week, the gap can be filled at seventy to eighty percent.

Conversely, if the coaching staff waits for Kim Sang Sik's return to begin real tactical work, that one week becomes a crack that cannot be welded back in the remaining time.

There is another detail I noticed while watching Vietnam's matches under Kim Sang Sik. This team plays best when allowed to press at its own rhythm – the rhythm of its conductor. In matches where Kim stands near the touchline and constantly adjusts the team's spacing, Vietnam wins. In matches where he sits motionless on the bench, the team loses its rhythm. This is not coincidence. It is the hallmark of a coach who uses his physical presence to transmit energy. And a man grieving his father will not be able to transmit that kind of energy the moment he steps off the plane.

I am not saying this to blame anyone. I am saying this because it is the truth no newspaper has put on its front page.

Contrarian angle: When a funeral becomes a system's test

Now I will ask a question you may not like.

If Vietnam performs well at the 2026 ASEAN Cup without Kim Sang Sik during the final week of preparation, what does that say about the actual role of a head coach?

You may be thinking I am downplaying a family's grief. No. I am downplaying another myth – the myth that a head coach is everything. In modern football, the role of the man at the helm has been inflated by the media. A good national team is run by a system: coaching staff, data analysis unit, medical team, psychology team. Kim Sang Sik is an important link, but not the entire chain.

If during a week without him Vietnam still maintains its tactical structure, that is evidence that the Vietnam Football Federation has built a real system. And that would be better news than any group-stage victory.

But if during a week without him Vietnam falls into chaos, loses its bearings, concedes from unmarked situations – that is evidence that this national team still depends on one individual. And in modern football, individual dependence is a form of structural risk.

I know this will upset a segment of fans. I accept that. Accepting being hated is the fee I pay for writing a truth no one ordered.

There is one more detail I want to mention, and I say this as a Korean who has lived abroad for many years. Kim Sang Sik's father passed away at 84 after a long illness. That is not a sudden death – that is a foretold death. In psychology, the period before it is called "anticipatory grief" – when a person about to lose a loved one begins processing the loss before it happens. If Kim Sang Sik went through that period in the weeks before, the shock when his father died may be psychologically lighter than a sudden death. This does not make the pain smaller. But it may shorten the recovery time.

This is information no newspaper carries, because it is not dramatic enough. But it matters.

Blind spot: The pressure no one mentions

Vietnamese media are handling this story gently – and correctly. They focus on sympathy, on the affection the Vietnam Football Federation has shown Kim Sang Sik, on the professionalism of a man who has poured himself into Vietnamese football. That is decent reporting.

But there is another pressure no one mentions. It is the pressure Kim Sang Sik places on himself.

When you are a foreign coach in a Southeast Asian country, you always work under a special kind of microscope. Fans watch your every step, every facial expression, every sentence in a press conference. When the team wins, you are called a genius. When the team loses, you are reminded that you are foreign. This is an unequal game, and Kim Sang Sik knows it better than anyone.

Now, as he returns to South Korea to mourn his father, a part of his mind will always point toward Vietnam. That is the instinct of a professional coach. And that instinct will eat into the time he needs to truly be with his family.

When he returns to Vietnam after a week, he will have to prove – to himself, to the team, to the Federation, and to the fans – that personal grief does not affect the job. That is an invisible but real pressure. And in a top-level football environment, where every sign of weakness is exploited, that pressure can be a heavier burden than losing a week of preparation.

I have seen coaches return after funerals and try to appear stronger than they really are. The results are usually not good. Not because they are incompetent, but because they do not allow themselves to be weak in an environment with no room for weakness.

What to watch

There are three signals I will track in the coming days.

First, the official date of Kim Sang Sik's return. If he comes back exactly one week later, that is a good sign. If he stays longer, the question of tactical preparation becomes more serious, but it also shows family is truly the priority – something I respect.

Second, the composition of the coaching staff in training sessions during his absence. If the Korean assistants lead and follow the curriculum properly, the gap is being filled systematically. If sessions drop in intensity or change structure, that is a warning sign.

Third, Kim Sang Sik's demeanor at his first press conference after returning. Not the words he says – the way he says them. The body language of a man who just lost his father will differ from the body language of a man returning from vacation.

And if you think these are small details, remember what I learned from that night in Kazan in 2026: the greatest team in the world collapsed due to small details no one considered important.

Germany did not lose because they were inferior; Germany lost because they forgot that South Korea knew who they were playing. Vietnam is no different. The 2026 ASEAN Cup will not be decided by a 90th-minute goal. It will be decided by one week in Seoul that no one outside is watching.

When the stands are empty, listen to the ball instead of the shouts. And right now, in South Korea, there is a coach listening to something entirely different.