Former teammates, now opponents. On February 13, Kamaru Usman returns to defend his welterweight title against Gilbert Burns. Related PostsWatch: Free Fight — Khamzat Chimaev vs. Li JingliangDaniel Cormier backing Tony Ferguson against Paddy PimblettKhamzat Chimaev says he’s ‘coming’ for Sean StricklandWatch: Mike Tyson trains Francis Ngannou in open workout ahead of Fury boutWatch: Dana White defends Tony Ferguson vs. Paddy Pimblett matchmakingBob Arum: Ngannou is more dangerous than Dillian Whye or Derek Chisora Comments comments