Kamaru Usman defeated Colby Covington by unanimous decision to retain the UFC welterweight championship at UFC 268 in New York on Saturday night. With the win, Usman improved to 20-1-0, and has won 19 fights in a row, including five title defenses. Going into the fight, Covington said he had recalibrated his approach and would not fight the same way as he did in their first encounter.