Boxing: The only heavyweights to have won the world title three times

Muhammad Ali

February 1964: v Sonny Liston, Miami

Knock-out in round seven to claim the undisputed world title

October 1974: v George Foreman, Zaire

Knock-out in round eight to win the undisputed world title

September 1978: v Leon Spinks, New Orleans

Won WBA title in round 15

Evander Holyfield

October 1990: v James 'Buster' Douglas, Las Vegas

Knock-out in round three for undisputed world title

November 1993: v Riddick Bowe, Las Vegas

Won WBA and IBF titles in round 12

November 1996: v Mike Tyson, Las Vegas

TKO in round 11 to win the WBA title