Thai Muay Thai champion Petchsila Wor Auracha successfully defended and unified the Rajadamnern Stadium super bantamweight title with a unanimous decision victory over Japan's Koki Osaki at RWS Knocktoberfest on October 10, 2026, in Bangkok. After five rounds, the judges awarded Petchsila the victory with scores of 49-46, 49-46 and 50-45.


The highly anticipated matchup brought together two champions. Petchsila entered the ring as the reigning Rajadamnern Stadium champion, while Osaki held the interim title after knocking out Chaitone Wor Auracha in the first round of their June 2026 encounter. The Japanese fighter was also the reigning RISE World Bantamweight Champion, making the contest particularly significant for fans of both Muay Thai and kickboxing.


Osaki started aggressively, repeatedly moving forward with punches and attempting to close the distance. However, Petchsila used his southpaw stance and excellent timing to control much of the action. His powerful left middle kicks repeatedly found their target, while his movement, knees and clinch work prevented Osaki from establishing a consistent offense.



As the fight progressed, Osaki increased the pressure and continued searching for an opportunity to turn the contest around. Petchsila remained composed, maintaining his distance and responding with accurate kicks whenever his opponent advanced. Even in the fifth round, when Osaki pushed forward looking for a knockout, the Thai champion successfully neutralized his attacks.


The judges ultimately awarded Petchsila a convincing unanimous decision, allowing him to retain his championship and unify the Rajadamnern Stadium super bantamweight title at 122 pounds (55.3 kg). Despite the defeat, Osaki received recognition for his determination and aggressive performance throughout the five-round contest. The Japanese fighter was awarded a 250,000-baht Fighter Spirit bonus. For Petchsila, the victory reinforces his position among the leading fighters in the division and demonstrates the importance of timing, distance management and technical control in traditional Muay Thai.