The dust has barely settled on Vietnam’s ASEAN Cup triumph over Thailand, yet Southeast Asia’s fiercest football rivalry already has another date on the calendar.

Vietnam and Thailand will meet at 7:30pm on September 29 at the inaugural FIFA ASEAN Cup 2026, barely a month after Kim Sang Sik’s side defeated the War Elephants 4-2 on aggregate to retain the regional championship.

Vietnam begin their FIFA ASEAN Cup campaign against the Philippines at 7:30pm on September 26 before facing Thailand three days later. Their final group match is against Pakistan at 7:30pm on October 2.

The rapid rematch gives Thailand an almost immediate opportunity to respond to the disappointment of losing another ASEAN Cup final to their regional rivals.

Vietnam won the first leg of the ASEAN Cup 2026 final 2-0 before a dramatic 2-2 draw at My Dinh on August 26 sealed the championship.

Thailand twice went ahead in the second leg and had opportunities to put Vietnam under even greater pressure. A missed penalty and two own goals ultimately proved costly, leaving several Thai players devastated on the pitch after the final whistle.

Yet their reaction also revealed a different side of Anthony Hudson’s young team.

Unlike the scenes following their defeat to Vietnam in the final two years earlier, Thailand’s players remained as their opponents celebrated. They accepted the outcome and acknowledged Vietnam’s achievement rather than turning away from the trophy ceremony.

Hudson was left frustrated because he believed Thailand had produced enough football to make the contest even closer. More importantly, the performance reinforced his confidence that the result can be reversed when the teams meet again.

Thailand competed evenly with Vietnam, and at times held the upper hand, despite Hudson not having all of his preferred players available.

The coach expects that to change in September, when the tournament falls within a FIFA international window and Thailand should be able to summon a significantly stronger squad.

“The last two training camps did not fall within FIFA international windows, which made player selection difficult, although clubs were within their rights,” Hudson said. “For the September camp, however, we will have our strongest squad. Thailand’s objective is to win every match at FIFA ASEAN Cup 2026.”

That confidence makes the September encounter more than simply another meeting between familiar rivals.

FIFA ASEAN Cup 2026 will run from September 25 to October 5 and feature two divisions. Division 1 comprises the eight strongest participating teams, with Vietnam drawn in Group B alongside Thailand, the Philippines and Pakistan.

Group A features Indonesia, Malaysia, Singapore and Bangladesh, which replaced India following its withdrawal.

The format differs significantly from the ASEAN Cup traditionally contested in Southeast Asia. There are no semifinals. Only the top team in each group advances to the final, meaning a defeat in a major group fixture could have severe consequences.

That gives the Vietnam-Thailand match added importance. A loss could leave either side with little margin for error in the race to reach the championship game.

Vietnam therefore have little time to dwell on their latest success.

After completing their ASEAN Cup campaign, the players returned to their clubs to prepare for the new domestic season. Nguyen Dinh Bac and his teammates are expected to reassemble in mid-September, leaving Kim Sang Sik with around 10 days to prepare for the new tournament.

Thailand’s promise to return with a stronger squad means Kim will also need to assess carefully what happened in the second leg at My Dinh, where the visitors created numerous opportunities despite eventually losing the tie.

Financial incentives add another dimension to the competition.

The Division 1 champion is expected to receive $1 million, while the Division 2 winner is projected to earn $300,000. Each participating team is also expected to receive $125,000.

For Vietnam, however, the stakes extend beyond prize money. FIFA ranking points and their status as Southeast Asia’s leading national team will also be at stake.

Thailand, meanwhile, arrive with the motivation of consecutive runners-up finishes in the ASEAN Cup and the belief that their strongest squad can change the balance.

Vietnam won the trophy and the latest battle. Just over a month later, the region’s defining football rivalry will begin all over again.

Dai Nam