Main Story: The 2026-27 ONE Flyweight Muay Thai World Grand Prix opens Nov. 13 at Bangkok’s Lumpinee Stadium, with Rodtang Jitmuangnon facing Nong-O Hama and rising contenders Shimon Yoshinari and Ramadan Ondash meeting in the co-main event. The eight-fighter tournament offers a path to the Grand Prix belt and ONE world title, with the opening bouts testing whether established stars or emerging talent are best positioned to claim them.

By the Numbers
  • 8 fighters in the Grand Prix; the winner earns the silver Grand Prix belt and ONE Flyweight Muay Thai World Title.
  • Two quarterfinals feature four of the division’s top-five ranked contenders.
  • Shimon is 22 with a 27-1 record; Ondash is 20.
  • Contenders are pursuing US$100,000 contracts.
Yes, But

Rodtang brings proven pressure and power, but returns to Muay Thai after competing under kickboxing rules and suffering a fifth-round TKO loss in his April 2026 rematch with Takeru Segawa. Nong-O, a former champion with deep experience, is coming off a knockout loss in his bid for the vacant flyweight title. Shimon and Ondash, meanwhile, arrive with momentum but must prove themselves against the division’s top names.

State of Play
  • Rodtang vs. Nong-O headlines the quarterfinals after their originally scheduled title fight was canceled.
  • Shimon and Ondash meet in the co-main event; the winner advances to face the winner of the legends’ bout.
  • The event streams exclusively for members at live.onefc.com from Lumpinee Stadium in Bangkok.
What’s Next

The Nov. 13 quarterfinal winners move closer to the tournament title and a shot at the ONE flyweight crown. The results will also reveal whether the veterans can hold off a fast-rising generation—or whether the young contenders can reshape the bracket.

Bottom Line

This opening night puts legacies and a new generation’s ambitions on the same path to a world title: the legends must prove they still belong, while Shimon and Ondash have a chance to show the future has arrived.