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Sport, Boxing, Miami, USA, 20th February 1964, Heavyweight Championship of the World, Cassius Clay, (Muhammad Ali) is pictured in Miami prior to his fight with Sonny Liston, In that fight the challenger Clay won the World Title from Champion Liston who failed to appear for the 7th round complaining he had hurt his shoulder and giving Clay a T,K,O, victory (Photo by Popperfoto via Getty Images/Getty Images)

Sport, Boxing, Miami, USA, 20th February 1964, Heavyweight Championship of the World, Cassius Clay, (Muhammad Ali) is pictured in Miami prior to his fight with Sonny Liston, In that fight the challenger Clay won the World Title from Champion Liston who failed to appear for the 7th round complaining he had hurt his shoulder and giving Clay a T,K,O, victory  (Photo by Popperfoto via Getty Images/Getty Images)