Terence Crawford became the undisputed junior welterweight champion after a stunning third-round knockout of Julius Indongo.
Crawford, 29, improved to a 32-0 win-loss with his victory at the Pinnacle Bank Arena in Nebraska, his home state, on Saturday.
The American landed a crushing shot to the body of Indongo (22-1) in the third round, unifying the WBA, WBC, IBF and WBO titles.
Crawford - who held the WBC and WBO titles prior to the fight - was dominant from the outset, and he knocked Indongo down during the second round.
While the Namibian managed to get up on that occasion, Crawford landed a huge body shot in the third for the knockout.