27th May 1963: Supremely confident American boxer Cassius Clay holds up five fingers in a prediction of how many rounds it will take him to knock out British boxer Henry Cooper. (Photo by Kent Gavin/Keystone/Getty Images)
27th May 1963: Supremely confident American boxer Cassius Clay holds up five fingers in a prediction of how many rounds it will take him to knock out British boxer Henry Cooper. (Photo by Kent Gavin/Keystone/Getty Images)