
Kamaru Usman will face Khamzat Chimaev in the co-main event of UFC 294, after replacing Paulo Costa on 10 days’ notice.
Usman, who reigned as welterweight champion from 2018 until 2022, will make his middleweight debut in the bout, which pits him against one of the most dominant prospects in mixed martial arts. Swedish-born Russian Chimaev is 12-0 as a professional with 11 stoppage wins.