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27th May 1963: American Heavyweight boxer Cassius Clay (later Muhammad Ali) lying on his hotel bed in London. He holds up five fingers in a prediction of how many rounds it will take him to knock out British boxer Henry Cooper. (Photo by Len Trievnor/Daily Express/Hulton Archive/Getty Images)

27th May 1963:  American Heavyweight boxer Cassius Clay (later Muhammad Ali) lying on his hotel bed in London. He holds up five fingers in a prediction of how many rounds it will take him to knock out British boxer Henry Cooper.  (Photo by Len Trievnor/Daily Express/Hulton Archive/Getty Images)