Vietnam wins ASEAN Cup 2026: The smart pressing tactics of Coach Kim Sang-sik

On the night of January 5, 2026, at Rajamangala Stadium under heavy rain, Nguyen Xuan Son sprinted down the right wing, dragging the entire Thai defense toward the byline. That was not a lucky moment. It was the product of a system rebuilt since last June. When Kim Sang-sik took over as head coach of the Vietnam national team, many thought he was just an interim. But the Korean manager inherited Park Hang-seo's philosophy, loosened the pressing range, and handed freedom to the two center-backs. The second leg final was no longer the image of Vietnam sitting deep like in SEA Games 2026. Instead, the team pushed their defensive line 15 meters higher on average, playing a more advanced offside trap. Stats from Vietnam's six group-stage matches show an expected goals against (xGA) of only 0.7 per game. But what impressed my analysis crew more was not the defensive number. It was their transition. No more haphazard long balls: Vietnam circulated the ball through the middle zone for 3.8 seconds before launching the decisive pass. I watched Pham Tuan Hai's opening goal in the 22nd minute repeatedly. It started with a low interception from Le Phong Hong, dragging Thailand's entire shape horizontally. Quang Hai did not run to the ball but moved into the space behind the opponent's central midfielder – a blind spot in their 4-4-2 structure. Then four passes in 11 seconds delivered the ball to Tuan Hai. No need for 65% possession. Television viewers might think Thailand dominated and played better. In reality, Vietnam allowed the opponent to control midfield but blocked every central route. When the ball was switched wide, the full-back pressed immediately, creating a pressing trap with the central midfielder. That was a perfected version of what Coach Troussier had failed to implement a year earlier. Statistics do not lie on their own: Vietnam won 4 of their 6 matches in the tournament, never by more than two goals. That was enough to counter suspicious looks. For a team that had won only 4 in their previous 10 matches, last night's trophy was more than an achievement. It was a beautiful shock to the analysts who had prematurely written the obituary of defensive football. When I hand-drew the pressing diagrams of Vietnam in this competition, I noticed something not in the numbers: the difference came from Kim Sang-sik's patience. He did not try to 'fix' the defensive identity that had been Vietnam's trademark but turned it into a confident weapon. Football is not a single color. The victory in Bangkok should be read as a manifesto: Vietnam does not need to play the 'modern' football that hipsters love to win titles; they just play their own game at its best. The match ended when I found the pattern of victory. My final note for the final was not a new tactical formula, but the moment Quang Hai cherished the silver trophy. He once cried after a miss in the UAE in 2026. So sometimes, football is more than the intelligence of diagrams. It's a story of people who dare to repeat the same wrong problem until it becomes the right answer.