ONE Fight Night 22: Sundell vs. Diachkova was a combat sport event produced by ONE Championship that took place on May 4, 2024, at Lumpinee Boxing Stadium in Bangkok, Thailand.

[1][2][3] A ONE Women's Strawweight Muay Thai World Championship bout between current champion Smilla Sundell and Natalia Diachkova headlined the event.

As a result, Sundell was stripped of the title and only Diachkova was eligible to win it.

[5] Former ONE Bantamweight Kickboxing Champion Hiroki Akimoto made his return after a 1-year and 5-month hiatus against former K-1 Lightweight Champion and promotional newcomer Wei Rui in a bantamweight kickboxing bout.

His bout proceeded at catchweight and he was fined a percent of his purse which went to his opponent The Ultimate Fighter: China welterweight winner Zhang Lipeng.