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UNITED STATES - MAY 29: The American Boxer Cassius Clay (Left) Fighting The World Heavyweight Champion Sonny Liston On The Ring Of World Championship In Miami Beach, Florida On February 28, 1964. After This Match, Cassius Clay Becomes Muhammad Ali. (Photo by Keystone-France/Gamma-Keystone via Getty Images)

UNITED STATES - MAY 29:  The American Boxer Cassius Clay (Left) Fighting The World Heavyweight Champion Sonny Liston On The Ring Of World Championship In Miami Beach, Florida On February 28, 1964. After This Match, Cassius Clay Becomes Muhammad Ali.  (Photo by Keystone-France/Gamma-Keystone via Getty Images)