ONE Fight Night 40: Buntan vs. Hemetsberger 2 was a combat sports event produced by ONE Championship that took place on February 14, 2026, at Lumpinee Boxing Stadium in Bangkok, Thailand. A ONE Women's Strawweight Kickboxing World Championship bout between current Champion Jackie Buntan and current ONE Women's Strawweight Muay Thai World Champion Stella Hemetsberger headlined the event. The pairing previously met at ONE Fight Night 35 in September 2025, where Hemetsberger captured the vacant title by unanimous decision.
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