Tang Kai

ONE Championship: X was a Combat sport event held by ONE Championship on March 26, 2022, at the Singapore Indoor Stadium in Kallang, Singapore.

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 27: Tang vs. Abdullaev was a combat sports event produced by ONE Championship that took place on January 11, 2025, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Featherweight World Championship bout between current champion Tang Kai and Akbar Abdullaev headlined the event. At the weigh-ins, Abdullaev failed two hydration tests and changed to five-round non-title bout in a 156.75 pounds instead.

ONE 166: Qatar was a combat sport event produced by ONE Championship that took place on March 1, 2024, at Lusail Sports Arena in Lusail, Qatar. A ONE Middleweight World Championship bout between current champion Reinier de Ridder (also former ONE Light Heavyweight World Champion) and the ONE Light Heavyweight and Heavyweight Champion Anatoly Malykhin headlined the event.

ONE Fight Night 43: Tang vs. Gasanov was a combat sports event produced by ONE Championship that took place on May 16, 2026, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Featherweight World Championship bout between current champion Tang Kai and Shamil Gasanov headlined the event.