Desc: Muhammad Ali, the Greatest: Directed by William Klein. With Muhammad Ali, Sonny Liston, Angelo Dundee, Jack Nilon. He's the greatest fighter of all time. A sports icon that is loved throughout the world. A man driven by his ambition to be the best. Muhammad Ali is a name that to this day puts fear in the strongest of men. Hear from the people who knew him best, from experts of the world of boxing, relive the legendary fights and explore the life of boxing's greatest symbol, Ali.