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.