Thai badminton is facing an institutional and athletic crisis following the loss of world number one Kunlavut Vitidsarn’s top ranking, a high-profile doping suspension, a collapsed major sponsorship deal, and the defection of key doubles stars from national team management, according to reports published by vietnam.vn.

Kunlavut Vitidsarn Loses World No. 1 Ranking After Early Exits

Just weeks after securing a historic men’s singles gold medal at the 2026 Asian Games on September 29 by defeating Singapore’s Loh Kean Yew 21-12, 21-16, reigning world number one Kunlavut Vitidsarn suffered a sharp decline in form. The 25-year-old dropped his opening match at the Denmark Open on October 13 to Denmark’s Rasmus Gemke, losing 21-17 and 21-12 after taking the first set 21-13. A week later at the French Open, Kunlavut won the opening set 21-9 against Toma Junior Popov before dropping the next two sets 21-14 and 21-15. Following the early exits, Kunlavut told reporters, I am very tired. My performance today was not good enough to win. France’s Christo Popov subsequently won the French Open title on October 25, overtaking Kunlavut atop the Badminton World Federation rankings.

Pitchamon Opatniputh Suspended in Doping Investigation

The athletic slide coincided with disciplinary fallout in the national youth ranks. Nineteen-year-old Pitchamon Opatniputh, a former world junior champion, tested positive for furosemide—a banned diuretic that can mask other prohibited substances—in a sample collected on September 17 during the 2026 Asian Games. Pitchamon was immediately suspended and disqualified from the competition. On October 19, the International Doping Control Organization (IOC) announced that the player had accepted the findings and disciplinary consequences, with her case forwarded to the Badminton World Federation for further action.

Victor Terminates Partnership with Badminton Association of Thailand

Amid the on-court struggles and doping case, the Badminton Association of Thailand saw its commercial agreements unravel. On October 22, sports apparel manufacturer Victor terminated its partnership with the association, despite both sides having announced a four-year collaboration spanning 2026 to 2030 just months prior in May. Association Monthon Satchukorn stated that the initial announcement was made while negotiations were still ongoing and that unresolved disagreements over contract terms prevented a final signing. On October 25, women’s doubles standouts Benyapa Aimsaard and Nuntakarn Aimsaard—known as Anna and Muna—announced they were ending their association management to compete independently. Former world number nine pair and 2025 US Open champions Anna and Muna stated they are seeking separate funding and equipment sponsors, though their departure does not preclude future national team appearances.

French Open Early Exits for Wider Thai Delegation

The broader national team struggled alongside its top singles player during the European swing. At the French Open, all Thai competitors were eliminated before the quarterfinal round. Women’s singles player Pornpawee Chochuwong fell to former world champion Nozomi Okuhara, while the mixed doubles pair of Dechapol Puavaranukroh and Supissara Paewsampran exited in the opening round.