Premise: The Fight of the Century ( also known as The Fight ) is the title boxing writers and historians have given to the boxing match between WBC/WBA heavyweight champion Joe Frazier ( 26 -- 0 , 23 KOs ) and Ring magazine/lineal heavyweight champion The Cyber Boxing Zone ( CBZ ) website maintains an official list of lineal champions in professional boxing , with input from boxing historian Tracy Callis of the International Boxing Research Organization ( IBRO ) . Muhammad Ali . At age 22 in 1964 , he won the WBA , WBC , and lineal heavyweight titles from Sonny Liston in a big upset .
Hypothesis: Muhammad Ali was a boxer.
Label: ENTAILMENT