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American heavyweight boxer Cassius Clay (later Muhammad Ali, centre) poses in the ring in mock victory over British pop group The Beatles at the 5th Street Gym in Miami, during the run-up to his title fight against Sonny Liston, 22nd February 1964. The Beatles are visiting the US for the first time. On the canvas, left to right: Paul McCartney, John Lennon (1940 - 1980), George Harrison (1943 - 2001) and Ringo Starr. (Photo by Chris Smith/Popperfoto via Getty Images/Getty Images)

American heavyweight boxer Cassius Clay (later Muhammad Ali, centre) poses in the ring in mock victory over British pop group The Beatles at the 5th Street Gym in Miami, during the run-up to his title fight against Sonny Liston, 22nd February 1964. The Beatles are visiting the US for the first time. On the canvas, left to right: Paul McCartney, John Lennon (1940 - 1980), George Harrison (1943 - 2001) and Ringo Starr. (Photo by Chris Smith/Popperfoto via Getty Images/Getty Images)