Sonny Liston in 1964
The two fights between Muhammad Ali and Sonny Liston for boxing's World Heavyweight Championship were among the most anticipated, watched and controversial fights in the sport's history. Sports Illustrated magazine named their first meeting, the Liston–Clay fight (Ali had not yet changed his name from Cassius Clay), as the fourth greatest sports moment of the twentieth century.
The first bout was held in February 1964 in Miami Beach, Florida. Ali (then Clay) won when Liston gave up at the opening of the seventh round (after being clearly dominated in the sixth). Their second fight was in May 1965 in Lewiston, Maine.