One of the most exciting boxers ever, Frazier fought Muhammad Ali in three epic fights. First came the Fight of the Century on March 8, 1971, the first time in history that two undefeated champions fought for the same title. Frazier sealed the victory with a knock-down in the 15th round and went on to win the decision. Then came the rematch on January 28, 1974 when Ali won a 12 round decision. Finally, the greatest heavyweight championship fight of all times, the Thrilla in Manila on September 30, 1975 which Ali won when Frazier couldn't come out for the 15th round.