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.

Marat Grigorian is an Armenian-Belgian kickboxer currently signed to ONE Championship, where he competes in the featherweight division. Grigorian has previously competed for Glory and is a former Glory Lightweight Champion. He is famous for his technical aggressive fighting style and knockout power. Combat Press ranks him as the #2 lightweight and #4 pound-for-pound kickboxer in the world. As of October 12, 2023, he is ranked #2 in the ONE Featherweight Kickboxing rankings.