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On March 8, 1971, Joe Frazier and Muhammad Ali fought for the boxing heavyweight championship. Both fighters were undefeated at the time of the bout.
Frazier, who knocked Ali down with a left hook in the 15th round, won by unanimous decision.
For Ali, it was just his third fight following a 2 1/2 year absence from the sport after being stripped of his title for refusing induction into the service during the Vietnam war.
The bout, which was held at Madison Square Garden and dubbed the "Fight of the Century," was the first of three bouts between the two boxers.