A ONE Flyweight World Championship rematch between current three-time champion Adriano Moraes and former UFC Flyweight Champion (also 2019 ONE Flyweight World Grand Prix Champion) Demetrious Johnson headlined the event. The pairing previously met at ONE on TNT 1 in April 2021 where Moraes defeated Johnson by KO in Round 2.

"ONE on TNT 1" was a Combat sport event held by ONE Championship on April 7, 2021 at the Singapore Indoor Stadium in Kallang, Singapore. This event will mark the debut of ONE Championship on American television network TNT.