Vietnam's AFF Cup 2026 Victory Journey: Is the Kim Sang-sik Era Really Solid?

On the night of the second leg of the 2026 AFF Cup final at Rajamangala Stadium, the referee blew the final whistle. Nguyen Xuan Son knelt down, his face buried in his hands, tears streaming down his sun-tanned skin. Thaisan. In the stands, thousands of Vietnamese fans erupted in a sea of red and yellow stars. The 3-2 victory in Bangkok secured Vietnam's third Southeast Asian championship, ending a journey full of emotions under coach Kim Sang-sik. But the joy lasted only 48 hours for professionals. Right after the glory, big questions began to hang: Is this victory the result of a sustainable era, or just a lucky flash in a broader picture of Vietnamese football? Five months have passed, and life waits for no one. The context of this championship was shaped by major changes. Kim Sang-sik only took over the national team in May 2026, replacing Philippe Troussier after a forgettable Asian Cup. Fans still remember the team leaving Qatar with three losses, followed by a defeat to Indonesia in World Cup qualifiers. The transition happened amid a new coaching staff having to repair trust, rebuild playing style, and heal psychological wounds for a generation of players heavily criticized. Yet, in just eight short months, the Korean strategist achieved what his predecessors could not: Fans loved the team again. And victories over Thailand in the final and Singapore in the semifinal brought Vietnam back to the top of the region. Analyzing from a data perspective, Vietnam's championship run has undeniable numbers. In the tournament, Vietnam scored a total of 19 goals in 8 matches, with Nguyen Xuan Son contributing 7 goals and 4 assists, breaking the scoring record in a single AFF Cup. In terms of possession, the team held only 52% on average, far lower than Thailand's 61%, but attacking efficiency was completely superior. They created 2.7 expected goals (xG) per match, while opponents had only 1.9. The team exploited set pieces very well, a factor heavily drilled. Seven of the 19 goals came from set-piece situations, showing the Korean assistant's tactical influence in exploiting spaces from high crosses. Deeper, this was not the total control style of Troussier's philosophy, but a pragmatic and transformative style. Kim Sang-sik built a squad with a core of experienced players like Que Ngoc Hai, Do Hung Dung, Nguyen Quang Hai, combined with youth like Vu Van Thanh, Pham Tuan Hai. He created a balanced team between solid defense and varied attack. Their transition from defense to attack was quick, with long passes over the lines or combination plays in the center. Thailand in the final was helpless in dealing with these textbook counterattacks. Beyond tactics, success came from the human element. Nguyen Xuan Son, a naturalized Brazilian-born player, became the new symbol of Vietnamese football. He not only scored but also dragged the opposing defense, creating space for teammates. His presence boosted confidence among young players. Meanwhile, goalkeeper Dang Van Lam showed impressive form with important saves at crucial moments. The defense led by Que Ngoc Hai and Bui Tien Dung (though only part-time starter) played disciplined, error-free football. The key point fans rarely see: the chemistry and team spirit. Kim Sang-sik is considered a great man-manager. He listens, understands player psychology, turning the locker room into a family. Unlike Troussier, he does not impose a rigid philosophy but flexibly adjusts to each opponent. That flexibility builds trust among players. They are willing to fight to the last minute for the Korean coach, something hard to see in the previous period. But if we only look at the championship glory, we may miss big blind spots. In the first leg final at Viet Tri, the team was lucky to win 2-1 when Thailand made two individual errors. In the second leg, the defense showed many gaps against the pace of number 10 Chanathip. If the Thai goalkeeper had performed better, the result could have been different. Many international analysts pointed out that Thailand still has a better player quality in terms of technique; the difference came from mentality and luck. Moreover, the AFF Cup championship happened while other Southeast Asian teams like Indonesia, Malaysia, Thailand are investing heavily in naturalized players and youth development. Meanwhile, Vietnamese football shows signs of stagnation in foundation development. The failure at ASIAD 2026 and U23 Asian qualifiers raised questions about youth training quality. The current U22 generation lacks outstanding talents, and relying on aging players like Que Ngoc Hai (born 2026) is a problem. AFF Cup 2026 may be the last tournament for many key players. Financially, the Vietnam Football Federation was involved in controversy when signing a sponsorship deal worth only 10 million USD for the 2026-2027 period, significantly lower than other nations. Domestic clubs also struggle to find sponsors, partly due to betting scandals. Even Binh Duong Club had to sell players to cover losses. In that context, keeping talented players abroad is nearly impossible. We must also discuss injuries and dense schedules. Nguyen Xuan Son suffered a serious injury in the final and had to take a long break. He couldn't join the FIFA Days camp in March 2026, and the team lacked a main striker, causing difficulties in friendlies and Asian Cup qualifiers. This raises questions about the lack of thorough medical and physical preparation. Looking at the regular season: V.League clubs still show no improvement in professional quality. Some matches have signs of negativity, VAR is not fully applied, and local referees often make mistakes. In such a context, the national team remains the only source of joy for fans. Looking to the future, the core question is not whether Vietnam can defend the AFF Cup title in 2026, but how to develop sustainably. Talents like Nguyen Cong Phuong, Nguyen Van Toan have passed their prime, but they have no worthy successors. In youth teams, names like Nguyen Thai Son, Nguyen Van Truong are still too green. Clubs still hesitate to give opportunities to young players because of results. Without changes at the grassroots level, Vietnamese football will face a crisis after this golden generation cycle. One cannot deny what Kim Sang-sik and his players did at AFF Cup 2026 is a miracle, overcoming all doubts. It ignited passion and national pride. But the writer wants to emphasize that football should not live on memories. With a new status in Southeast Asia, the national team needs to rebuild its squad early, rejuvenating while maintaining stability. The greatest story may lie in Asian Cup 2027 or World Cup 2026 qualifiers. Kim Sang-sik has been offered a contract extension, but he certainly understands that his seat will only be protected by impressive performances on the continental stage. The team needs to compete against much stronger opponents like Japan, Iran, Iraq. Experience from AFF Cup is a stepping stone, but without improving the foundation, any regional title is ephemeral. Finally, look at the numbers: Vietnam has only 50 million people, two domestic leagues, yet a huge fan base. Fans can forgive, wait, but they can also turn away if football does not grow. The AFF Cup 2026 title is a miracle born of belief and determination. To create the next miracle, persistent hands must knead from the roots. There, financial spreadsheets are not just numbers but the basis for dreams. Transfer calls should not stop at tactics but must be a place to nurture young talents. The Kim Sang-sik era started beautifully, but for it to last, it needs more than just victories.