Muhammad Ali and Joe Frazier met in a three-fight series between 1971 and 1975.
The first fight was among the most hyped sporting events of the last half of the 20th century.
Both were undefeated fighters, and Ali was coming back to attempt to reclaim the heavyweight title that had been stripped when he refused military induction.
Ali was the classic boxer and Frazier the powerful slugger. The two went back and forth for 14 rounds, and Frazier appeared to have a small edge. In the 15th round, Smokin' Joe decked Ali with a smoking left hook. Ali got up from the brutal shot, but Frazier won the decision.
They met again in 1974 after Frazier had lost his heavyweight title to George Foreman. This time, Ali won a close decision.
In the final bout of the series, Ali and Frazier fought in the Philippines in 1975. The bout, called the "Thrilla in Manila," saw both fighters dish out and take tremendous punishment.
Ali started out the fight in top form, and he used his jab and sharp punching to take an early lead. However, in the middle rounds, Frazier used his power punches to brutalize Ali. Somehow, Ali managed to stay upright.
In the later rounds, Ali's punches had closed Frazier's eyes, and he could not see. Frazier's manager Eddie Futch would not allow him to come out for the 15th round, and an exhausted Ali won by TKO.