ONE Fight Night 43, scheduled for May 15, will showcase four exciting matchups at Lumpinee Stadium in Bangkok, Thailand. The main event features Diogo “Baby Shark” Reis, the reigning ONE Flyweight Submission Grappling World Champion, who is set to face Yuki Takahashi in a highly anticipated submission grappling bout. Reis, with a career record of 94-9, aims for his third consecutive victory against Takahashi, who is making his ONE debut. In bantamweight kickboxing, Petchtanong Petchfergus, a former champion with a record of 359-57, will take on Ben “The Problem” Woolliss, who recently made waves with a TKO victory over former champion John Lineker. The lightweight clash features Alibeg Rasulov (14-1) against Lucas Gabriel (11-1), both vying for title contention following their recent performances. Lastly, Yosuke Saruta, a former ONE Strawweight MMA World Champion, faces Fabio Henrique in a critical matchup for both fighters, as Saruta seeks to end a losing streak while Henrique aims for redemption after a defeat in his promotional debut.