ONE Fight Night 18

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.

Background
A ONE Flyweight Kickboxing World Championship bout between current champion Superlek Kiatmuu9 and Elias Mahmoudi was expected to headline the event. However, Mahmoudi withdrew from the bout due to rib injury. Superlek was instead to face former three-divisions K-1 World Champion Takeru Segawa at ONE 165 on January 28. As a results, a featherweight bout between Shamil Gasanov and Oh Ho-taek was promoted to main event status.

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. However, Harrison suffered a knee injury and the bout was scrapped.

Bonus awards
The following fighters received $50,000 bonuses.
 * Performance of the Night: Kwon Won-il and Rungrawee Sitsongpeenong