ONE Fight Night 9: Nong-O vs. Haggerty is an upcoming combat sports event produced by ONE Championship that will take place on April 21, 2023, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Bantamweight Muay Thai World Championship bout between current champion Nong-O Gaiyanghadao and former ONE Flyweight Muay Thai World Champion Jonathan Haggerty headlined the event.

ONE Championship One 158 took place Friday, June 3, 2022 with 13 fights at Singapore Indoor Stadium in Singapore.