A ONE Lightweight World Championship rematch between current champion Ok Rae Yoon and former champion (also 2019 ONE Lightweight World Grand Prix Champion) Christian Lee headlined the event. The pairing previously met at ONE: Revolution in September 2021 where Ok defeated Lee by unanimous decision.

ONE Fight Night 30: Kryklia vs. Knowles was a combat sports event produced by ONE Championship that took place on April 5, 2025, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Heavyweight Muay Thai World Championship bout between current champion (also current ONE Light Heavyweight Kickboxing World champion) Roman Kryklia and promotional newcomer Lyndon Knowles headlined the event.