Watch Kamaru Usman have tough sparring session with Justin Gaethje before UFC 251 against Gilbert Burns

Kamaru Usman is preparing for his welterweight title defence against Gilbert Burns by enlisting Justin Gaethje as a sparring partner. ‘The Nigerian Nightmare’ will defend his 170lbs belt for the second time on Fight Island on July 11 at UFC 251 – a card containing three world title fights. Usman will take on one of […]