The images are accompanied by Smith's memories of his time spent with Ali from the early days of his career until his final years before retirement.
In 1964 Chris Smith was in the US to photograph The Beatles on their first tour of the country. After photographing the band he headed down to Miami to photograph Cassius Clay, as he was then known, training at the 5th Street Gym. Smith was curious about the athlete who was starting to become influential in the world of boxing. Fortuitously, he was in gym when the doors opened and, much to everyone's surprise, in walked The Beatles.