Kasidis opened the scoring for the Thai men's team at the SEA Games before losing to Indonesia 1-2 in matches, earning the silver medal.
In tennis at the 33rd SEA Games men's team final, the Thai national team, two-time defending champions (SEA Games 2021 and 2023), faced the Indonesian national team at the National Tennis Development Center in Muang Thong Thani, Nonthaburi Province, on 13 Dec 2025 GMT+7. The event was lively with cheers from Thai and international fans.
The first match started with the second singles player "Boom" Kasidis Samret, ranked world No. 419, narrowly losing the first set in a tiebreak 6-7 (7-9) to Justin Barkey, world No. 1530. Kasidis then recovered to win the next two sets 6-4 and 6-3, securing a 2-1 set victory and giving Thailand a 1-0 lead over Indonesia.
Next, the top singles player "Maxi" Maximus Prapol Jones (Thai-Australian), ranked world No. 357, could not overcome the strong play of Muhammad Rifqi Fiterdi, ranked world No. 771, losing 1-2 sets with scores of 3-6, 6-4, and 6-7 (6-8) in a close tiebreak.
As a result, Thailand and Indonesia were tied 1-1, leading to a decisive doubles match. Thailand sent Pratya Isro and Kasidis Samret to face Christopher Rungkat and Justin Barkey. The Thai pair could not resist, losing in straight sets 3-6 and 3-6.
In summary, Thailand lost to Indonesia 1-2 in matches, earning the silver medal, while Indonesia took gold. Malaysia and the Philippines received the bronze medals.