ONE Fight Night 37: Kryklia vs. Agdeve was a combat sports event produced by ONE Championship that took place on November 8, 2025, at Lumpinee Boxing Stadium in Bangkok, Thailand. An inaugural ONE Heavyweight Kickboxing World Championship bout between current ONE Heavyweight Muay Thai and Light Heavyweight Kickboxing World Champion Roman Kryklia and promotional newcomer Samet Agdeve headlined the event.

ONE Fight Night 41: Sinsamut vs. Jarvis was a combat sports event produced by ONE Championship that took place on March 14, 2026, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Women's Atomweight Muay Thai World Championship bout between current champion Allycia Rodrigues and current ONE Women's Atomweight Kickboxing World champion Phetjeeja Lukjaoporongtom was scheduled to headline the event. However, the bout was canceled after both fighters were injured. Therefore, a lightweight Muay Thai bout between Sinsamut Klinmee and George Jarvis headlined the event.