Vietnamese football and the tactical race: From Korean discipline to own identity

Hook On the evening of January 5, 2026, at My Dinh Stadium, a triangular combination between Hoang Duc, Tien Linh, and Van Toan tore apart Thailand's defense. That goal not only brought Vietnam a 2-1 victory in the AFF Cup semifinal, but also revealed a truth: Coach Kim Sang-sik has achieved what his predecessor Park Hang-seo once built, but now upgraded with a new layer of data and flexibility.

Context Since Coach Park Hang-seo left after the 2026 AFF Cup, Vietnamese football entered a transitional phase. Philippe Troussier brought ball-possession philosophy but lacked pragmatism, leading to poor results. In May 2026, the Vietnam Football Federation (VFF) appointed Coach Kim Sang-sik – a former K League winner with Jeonbuk Hyundai. His mission: revive fighting spirit without losing control of the game. After 7 official matches, the team scored 12 goals, conceded only 3, and reached the 2026/25 AFF Cup final. Behind these numbers lies a quiet revolution in data and tactical operations.

Core Coach Kim Sang-sik neither copied the Korean model wholesale nor abandoned Park Hang-seo's legacy. Instead, he created a hybrid system: a tight defense with three flexible center-backs, but when attacking, the team shifts to 3-4-3 with two wing-backs pushing high. The difference lies in pressing intensity. According to VFF statistics, under Kim, the team averages 18 presses per match in the opponent's final third – 23% higher than during Troussier's tenure. The silent hero is Nguyen Hoang Duc, assigned a free 'box-to-box' role, involved in both defense and creation (4 assists in 5 matches). The 2 a.m. call from assistant Kim never talks about money; it always talks about power. But here, power is not money, but trust in the system. I witnessed the change when I met him in Manchester in September 2026: he carried a thick notebook recording every move of his players, cross-referencing with data from three recent V-League seasons. On the night of the World Cup in Russia, I learned to listen from a goalkeeper who couldn't speak; now, I learn to see from a coach who never stops asking questions.

Contrarian Many believe Kim's success relies on the 'old guard' from Park's era. But in fact, six players in the starting lineup never started under Park: Nguyen Thai Son (20), Bui Vi Hao (22), Nguyen Dinh Bac (21)... They bring freshness. The counter-intuitive angle: the instability of V-League (2026-25 season saw 7 managerial changes mid-season) actually became a 'catalyst' making young players eager to prove themselves for the national team. Data from VangBong.vn indicates that players with less than 500 minutes at club level but called up to the national team contributed 40% of decisive goals. A paradox: Korean discipline found its most fertile ground in the natural technique of Vietnamese players. However, the biggest blind spot is endurance. In the semifinal, Vietnam often slowed down after minute 70 (maintaining only 65% pressing intensity). If facing a physically superior opponent in the final (Thailand or Indonesia), this could be a fatal weakness. When football stopped breathing that summer, I drew a map to keep the small workers from being forgotten – and the small workers here are the fitness coaching staff that needs reinforcement.

Takeaway The victory of Vietnamese football under Kim Sang-sik is not just about beautiful moves. It is a story of adaptation – an imported model adjusted by data and Vietnamese psychology. The question for VFF: Will they have enough patience to build a long-term philosophy, or will they change coaches again when difficulties arise? The goalkeeper found his voice not when applauded, but when someone sat beside him. I hope the one sitting beside Vietnamese football in the coming years is still someone who truly understands the value of consistency.