Nigerian-American mixed marital artist, Kamaru Usman retained his UFC welterweight title in Las Vegas after a hard-fought win against US challenger Colby Covington on Sunday, December 15, knocking him out in the final stages of fifth round.

Kamaru Usman stopped Colby Covington with 50 seconds remaining in the fifth round (final round) to retain his title.

But it wasn't an easy victory for Usman as he and his challenger engaged in an all-out war for nearly five full rounds before the Nigerian Nightmare finished off his opponent in style.