LONDON, ENGLAND - MARCH 03: A general view of the Muhammad Ali exhibition entitled 'I Am The Greatest', at The O2 Arena on March 3, 2016 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - MARCH 03: A general view of the Muhammad Ali exhibition entitled 'I Am The Greatest', at The O2 Arena on March 3, 2016 in London, England. (Photo by Samir Hussein/WireImage)