ONE Fight Night 18: Gasanov vs. Oh was a combat sport event produced by ONE Championship that took place on January 13, 2024, at Lumpinee Boxing Stadium in Bangkok, Thailand.

[1] A ONE Flyweight Kickboxing World Championship bout between current champion Superlek Kiatmuu9 and Elias Mahmoudi was expected to headline the event.

[3] Superlek was instead to face former three-divisions K-1 World Champion Takeru Segawa at ONE 165 on January 28.

[4] As a results, a featherweight bout between Shamil Gasanov and Oh Ho-taek was promoted to main event status.

[5] A bantamweight Muay Thai bout between former ONE Bantamweight Champion John Lineker, who making his Muay Thai debut against Liam Harrison was scheduled for this event.