Joe Frazier vs. Muhammad Ali, billed as The Fight of the Century or simply The Fight, was an undisputed heavyweight championship boxing match between WBA, WBC, and The Ring heavyweight champion Joe Frazier and Lineal champion Muhammad Ali, on Monday, March 8, 1971, at Madison Square Garden in New York City.

Joseph William Frazier, nicknamed "Smokin' Joe", was an American professional boxer who competed from 1965 to 1981. Widely regarded as one of the greatest heavyweight boxers of all time, he was known for his strength, durability, formidable left hand, and relentless pressure fighting style and was the first boxer to defeat Muhammad Ali. Frazier won a gold medal at the 1964 Summer Olympics as an amateur, held the NYSAC heavyweight title from 1968 to 1973, and was the undisputed heavyweight champion from 1970 to 1973.