ONE Fight Night 21: Eersel vs. Nicolas

ONE Fight Night 21: Eersel vs. Nicolas was a combat sport event produced by ONE Championship that took place on April 6, 2024, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Lightweight Kickboxing World Championship bout between current champion (also current ONE Lightweight Muay Thai World Champion) Regian Eersel and Alexis Nicolas headlined the event.

• Alexis NicolasSelf
• Regian EerselSelf
• Tye RuotoloSelf
• Izaak MichellSelf
• Suablack Tor.Pran49Self
• Vladimir KuzminSelf
• Ben TynanSelf
• Duke DidierSelf
• Denis PurićSelf
• Jacob SmithSelf
• Kade RuotoloSelf
• Francisco LoSelf