Muhammad Ali stands over Sonny Liston after knocking him out in the first round of their 1965 fight. Ali turns 70 today. (Neil Leifer/SI) GALLERY: Classic Photos of Muhammad Ali | Ali at 70VIDEO: Boxing historian Bert Sugar on greatness of AliSI VAULT: Ali beats Frazier in Manilla (10.13.75) #EasyPin
In the Fight of the Century, "Smokin Joe" Frazier became the first man to defeat Muhammad Ali. Frazier confidently heads for neutral corner after knocking out Muhammad Ali in the 15th round at Madison Square Garden. The decision was unanimous on that day in 1971.