Muhammad Ali taunts Sonny Liston after knocking him down to win their second fight in the first round in Maine, USA, in May, 1965. AP
Mohammad Ali throws a punch at Alfredo Evangelista during his unanimous points victory at the Capital Centre, Maryland, USA, on May 16, 1977. Getty
Mohammad Ali and Alfredo Evangelista during their heavyweight title bout. Getty
Mohammad Ali and Alfredo Evangelista during their heavyweight title bout. AFP
Muhammad Ali before his fight against Joe Frazier in the Philippines in October 1975. Ali won 'The Thrilla in Manila' in the 14th round. REX Shutterstock
Muhammad Ali, top, watches as defending world champion George Foreman goes down to the canvas during their heavyweight title bout in Kinshasa, Zaire. Ali won 'The Rumble the Jungle' in October, 1974, by knocking out Foreman in the eighth round. AP
Muhammad Ali and Joe Frazier during their second fight at Madison Square Garden in New York, in January, 1974. Ali won the fight after 12 rounds via a unanimous points verdict. AP
Ken Norton is hit with a left jab from Muhammad Ali during their fight at the Sports Arena on March, 1973, in San Diego, California. Norton won the fight via a split decision. Getty
Muhammad Ali goes down in the 15th round to a left hook from world heavyweight champion Joe Frazier in a title fight at Madison Square Gardens, New York, in March 1971. It was the first defeat of Ali's pro career in what was dubbed 'The Fight of the Century'. Getty
Joe Frazier stands over Muhammad Ali as he wins their 1971 fight. AFP
Muhammad Ali in training for his fight against Brian London in August 1966. Ali knocked out London in the third round at the Earls Court Arena in London. Getty
Muhammad Ali taunts Sonny Liston after knocking him down to win their second fight in the first round in Maine, USA, in May, 1965. AP
Mohammad Ali throws a punch at Alfredo Evangelista during his unanimous points victory at the Capital Centre, Maryland, USA, on May 16, 1977. Getty
Mohammad Ali and Alfredo Evangelista during their heavyweight title bout. Getty
Mohammad Ali and Alfredo Evangelista during their heavyweight title bout. AFP
Muhammad Ali before his fight against Joe Frazier in the Philippines in October 1975. Ali won 'The Thrilla in Manila' in the 14th round. REX Shutterstock
Muhammad Ali, top, watches as defending world champion George Foreman goes down to the canvas during their heavyweight title bout in Kinshasa, Zaire. Ali won 'The Rumble the Jungle' in October, 1974, by knocking out Foreman in the eighth round. AP
Muhammad Ali and Joe Frazier during their second fight at Madison Square Garden in New York, in January, 1974. Ali won the fight after 12 rounds via a unanimous points verdict. AP
Ken Norton is hit with a left jab from Muhammad Ali during their fight at the Sports Arena on March, 1973, in San Diego, California. Norton won the fight via a split decision. Getty
Muhammad Ali goes down in the 15th round to a left hook from world heavyweight champion Joe Frazier in a title fight at Madison Square Gardens, New York, in March 1971. It was the first defeat of Ali's pro career in what was dubbed 'The Fight of the Century'. Getty
Joe Frazier stands over Muhammad Ali as he wins their 1971 fight. AFP
Muhammad Ali in training for his fight against Brian London in August 1966. Ali knocked out London in the third round at the Earls Court Arena in London. Getty
Muhammad Ali taunts Sonny Liston after knocking him down to win their second fight in the first round in Maine, USA, in May, 1965. AP
