ONE Fight Night 13: Allazov vs. Grigorian was a combat sport event produced by ONE Championship that took place on August 5, 2023, at Lumpinee Boxing Stadium in Bangkok, Thailand.

[2] The pair met for the first time at Glory 7: Milan in 2013, but the fight ended in a no-contest due to an illegal elbow.

[8] A women's atomweight kickboxing bout between Supergirl Jaroonsak and Cristina Morales was expected to take place at the event.

[10][11] A lightweight muay thai bout between Liam Nolan and Rungrawee Sitsongpeenong was scheduled for this event.

All the bouts proceeded at catchweight with each being fined 25% his individual purse, which went to their opponents Kim Jae-woong, Edgar Tabares and Nauzet Trujillo respectively.