With Costa out, Usman-Chimaev is UFC 294 co-main event
Less than 24 hours after featherweight champion Alexander Volkanovski replaced an injured Charles Oliveira to face Islam Makhachev in the UFC 294 main event, former welterweight champ Kamaru Usman (20-3 MMA, 15-2 UFC) accepted an opportunity to take on Khamzat Chimaev (12-0 MMA, 6-0 UFC) in the co-main event on Oct. 21 in Abu Dhabi. … With Costa out, Usman-Chimaev is UFC 294 co-main event