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- Ali reacts after knocking out Sonny Liston - perhaps one of the most famous sporting photographs of all time (AP)
- Muhammad Ali (born Cassius Clay, Jr.; January 17, 1942) American former professional boxer, considered among the greatest heavyweights in the sport's history. May 25, 1965, heavyweight champion Muhammad Ali after his rematch with boxer Sonny Liston. Ali knocked out Liston in the first round. (Photo by: Universal History Archive/UIG via Getty images)
- American boxer Cassius Clay (later known as Muhammad Ali) points at the camera from an open car door as he takes part in a pre-football game parade, Miami, Florida, December 14, 1963. He was Miami to train for his title fight against Sonny Liston. (Photo by Underwood Archives/Getty Images)
- American boxer Cassius Clay (now Muhammad Ali) rests during training for the world heavyweight title fight against fellow American Sonny Liston at Miami Beach, Florida. Ali went on to win the match, making him world heavyweight champion for the first time. Original Publication: People Disc - HW0526 (Photo by Harry Benson/Getty Images)
- File photo dated 18/06/63 of British heavyweight boxer Henry Cooper after his fight at Wembley in London against boxing legend Muhammad Ali (right), who has died at 74.
- BOXING LEGENDS MUHAMMAD ALI AND HENRY COOPER POSE WITH EACHOTHER
- 11 Dec 1999: (from left to right) Boxing legends past and present Lennox Lewis, Harry Carpenter and Muhammad Ali pose for the cameras at the BBC Sports Personality of the Year Awards ceremony held at the BBC Television Centre, in London. \ Mandatory Credit: Craig Prentis /Allsport
- 19 Jul 1996: Muhammad Ali holds the torch before lighting the Olympic Flame during the Opening Ceremony of the 1996 Centennial Olympic Games in Atlanta, Georgia. \ Mandatory Credit: Michael Cooper /Allsport
- Boxing legend Muhammad Ali strikes a pose as he arrives with his wife Lonnie to watch his daughter Laila Ali take on Sweden's Asa Maria Sandell in a non-title bout in Berlin 17 December 2005. Ali received the Otto Hahn Peace medal earlier in the day. AFP PHOTO DDP/MARCUS BRANDT (Photo credit should read MARCUS BRANDT/AFP/Getty Images)
- The American boxer Muhammad Ali (born Cassius Clay), who first became world heavyweight champion in 1964. (Photo by Tim Graham/Getty Images)
- Muhammad Ali wins his world title bout against Germany's Karl Mildenberger in 1966. (Getty Images)
- UNITED STATES - MARCH 02: Cassius Marcellus Clay (Muhammad Ali) with Black Muslim leader Malcolm X at 125th St. and Seventh Ave. (Photo by John Peodincuk/NY Daily News Archive via Getty Images)
- 1964: Heavyweight Boxing Champion of the World, Cassius Clay, who later changed his name to Muhammad Ali. (Photo by Harry Benson/Getty Images)
- MIAMI BEACH, FL - FEBRUARY 25: Sonny Liston (L) in action lands a left jab vs Cassius Clay at the Convention Center in Miami Beach, Florida, February 25, 1964. Cassius Clay won the World Heavyweight Title by RTD in round 6 of 15. (Photo by Stanley Weston/Getty Images)
- NOV 5 1963; ALI, MUHAMMAD - INDIVIDUALS; 'I AM THE GREATEST. WHAT TIME IS IT?'; After a night of making Denver, and Sonny Liston in particular, aware of his presence. Cassius Clay and troupe found accomodations at the Albany Hotel. The Denver Post caught him in bad Tuesday morning asking for the time of day and telling hotel employees what a great night he had Monday on the Liston home's front lawn. (Photo By The Denver Post via Getty Images)
- The Greatest.