Ali remains the only three-time world heavyweight champion. He won the title in 1964, 1974, and 1978.
Between February 25, 1964 and September 19, 1964 Muhammad Ali reigned as the undisputed heavyweight boxing champion.
Here are some of his most memorable moments in the ring:
2. Ali (still known as Cassius Clay at the time) v. Henry Cooper in 1963.
The fight was Ali’s first fight as a pro outside of the United States. Henry Cooper was the reigning Commonwealth and British heavyweight champion.
Late in the fourth round Ali was floored by Cooper.