Thai badminton endured a turbulent period in late October 2026, losing its top men’s singles ranking, seeing its prominent women’s doubles pair step away from the national federation’s management, and suffering losses due to a doping scandal and the unexpected end of an equipment partnership, vietnam.vn reported.

The sudden downturn arrived just weeks after historic continental success. On September 29, 2026, twenty-five-year-old Kunlavut Vitidsarn defeated Singapore’s Loh Kean Yew 21-12, 21-16 in the men’s singles final at the Asian Games, capturing Thailand’s first-ever gold medal in the event and climbing back to the number-one spot in the world rankings.

Early Exits and the Loss of the Top Ranking

That momentum vanished in mid-October. At the Denmark Open on October 13, Kunlavut suffered a first-round exit against world No. 27 Rasmus Gemke, squandering a first-set win to drop the next two sets 21-17 and 21-12. A week later at the French Open, the top-ranked Thai star routed Toma Junior Popov 21-9 in the opening set before losing 14-21 and 15-21.

Reflecting on the physical toll after the match in France, Kunlavut admitted he was exhausted and unable to perform at the level required to win. Consecutive round-of-32 exits fueled immediate questions regarding his conditioning. By October 25, France’s Christo Popov claimed the French Open title at Roland Garros, securing enough ranking points to surpass Kunlavut in the next BWF world rankings.

Thai badminton faces sudden downturn and doping scandal in late October

Widespread Struggles Across the National Squad

The senior team’s difficulties extended well beyond the men’s singles draw. Every Thai representative at the French Open exited the tournament before the quarterfinal round. Pornpawee Chochuwong fell to former world champion Nozomi Okuhara, while mixed doubles pair Dechapol Puavaranukroh and Supissara Paewsampran bowed out in the opening round.

Compounding the athletic slide, off-court turmoil damaged the sport’s domestic standing. Nineteen-year-old Pitchamon Opatniputh, a former world junior champion widely viewed as the future of Thai women’s singles, tested positive for furosemida—a prohibited diuretic capable of masking other banned substances—in a sample collected September 17 during the Asian Games. Pitchamon was immediately suspended and disqualified from the competition.

Pitchamon Accepts Sanctions as Victor Terminates Partnership

The International Doping Test Agency announced on October 19 that Pitchamon accepted the findings and the resulting disciplinary consequences from the Asian Games infraction, with her case forwarded to the Badminton World Federation for further sanctioning. While that investigation unfolded, the Badminton Association of Thailand absorbed a major commercial blow.

Asian Games 2026: Thailand Badminton Star Pitchamon Tests Positive for Banned Drug

Sportswear manufacturer Victor announced on October 22 that it was terminating its partnership agreement with the federation, despite both sides having announced a four-year collaboration running from 2026 through 2030 just months prior in May. The abrupt split drew intense scrutiny because Victor was slated to replace Yonex as Thailand’s long-term equipment and logistical supplier.

Badminton Association of Thailand Monthon Satchukorn subsequently explained that the initial announcement was made while negotiations were ongoing and before any formal contract had been signed, with disagreements over terms ultimately sinking the deal. The federation stated it would pursue new commercial partners, though the collapse raised immediate governance concerns.

The Departure of Anna and Muna

The crisis deepened on the night of October 25 when sisters Benyapa Aimsaard and Nuntakarn Aimsaard—widely known as Anna and Muna—officially announced they were leaving the federation’s management system to compete independently.

The pair previously climbed to No. 9 in the women’s doubles world rankings, captured numerous international titles, became the first Thai women’s doubles duo to reach the season-ending tournament that brings together the best players in the world, and won the US Open in June 2025. In their public statement, the sisters thanked the federation, coaches, and supporters while pursuing independent sponsors for funding, equipment, and professional staff.

The split does not signal retirement or rule out future representation for the national team, and officials indicated no direct internal conflict prompted the move. Yet the departure of two elite athletes immediately following the collapse of the Victor partnership leaves lingering questions regarding the long-term stability and appeal of Thailand’s state-managed badminton framework.