Cassius Clay made his professional debut against Tunney Hunsaker, winning by a six-round decision.

Muhammad Ali won his first heavyweight title against Sonny Liston, becoming the youngest heavyweight champion at the time.

Ali defeated Liston in a rematch, knocking him out in the first round.

Ali fought Cleveland Williams, landing over 100 punches and scoring four knockdowns in three rounds.

Ali suffered a loss to Ken Norton, who broke Ali's jaw in the second round.

Ali employed the 'rope-a-dope' strategy to defeat George Foreman in Zaire, regaining the heavyweight title.

Ali fought Joe Frazier for the third time, winning when Frazier's corner stopped the fight after 14 rounds.