ONE Fight Night 20

ONE Fight Night 20: Todd vs. Phetjeeja was a combat sport event produced by ONE Championship that took place on March 9, 2024, at Lumpinee Boxing Stadium in Bangkok, Thailand.

Background
This event featured an all-female event on fight card in celebrated of International Women's Day. This also the second all-female event fight card of this organization since ONE: Empower in September 2021.

A ONE Women's Atomweight Kickboxing World Championship unification bout between current champion (also former interim ONE Women's Atomweight Muay Thai Champion) Janet Todd and interim champion Phetjeeja Lukjaoporongtom headlined the event.

A ONE Women's Atomweight Muay Thai World Championship bout between current champion Allycia Rodrigues and Cristina Morales served as the co-main event.

Multiple-time IBJJF World Champion Mayssa Bastos made her promotional debut against Kanae Yamada took place at the event.

At weigh-ins, Jihin Radzuan missed weight coming in at 120 lbs and failed hydration, while her opponent Chihiro Sawada failed hydration. Their bout was negotiated to continue at a catchweight. Yu Yau Pui also missed hydration, with the bout continuing at a catchweight of 118.5 lbs.