Terence Crawford has officially announced his retirement from boxing at the age of 38, claiming he has nothing left to prove. He leaves the sport undefeated, boasting a remarkable record that spans three divisions.

Five-weight boxing world champion Terence Crawford says he is "walking away as a great with nothing else left to prove" after announcing his retirement at 38.

With the win, Crawford became the first male boxer in the four-belt era to be undisputed champ in three weight classes.