ONE Fight Night 26: Lee vs. Rasulov was a combat sports event produced by ONE Championship that took place on December 7, 2024, at Lumpinee Boxing Stadium in Bangkok, Thailand.

[1][2][3] A ONE Lightweight World Championship bout between current champion (also the ONE Welterweight Champion and ONE Lightweight World Grand Prix winner) Christian Lee and Alibeg Rasulov headlined the event.

[6] They previously met at ONE Fight Night 24 in August 2024, where Bastos won the title by unanimous decision.

[8] Diego Paez was expected to make his promotional debut against Nakrob Fairtex in a flyweight muay thai bout.

[10] At the weigh-ins, former ONE Bantamweight Kickboxing World Champion Petchtanong Petchfergus failed hydration and missed weight for his bantamweight kickboxing bout against Nabil Anane and the bout was cancelled when Petchtanong was hospitalized and required IV drips.