Some of boxing’s greatest ever have been undisputed heavyweight champions during their career.
Iconic fighters like Muhammad Ali and Mike Tyson achieved the feat while Sonny Liston, George Foreman and Evander Holyfield have also held all the titles at once.
Tyson Fury and Oleksandr Usyk will do battle on May 18 in one of the biggest and most highly-anticipated fights of the modern era, with the winner joining the exclusive list.
WBC champion Fury will look to wrestle the WBA, WBO, and IBF titles away from Usyk to become the first undisputed heavyweight champion since British compatriot Lennox Lewis over two decades ago.
Lewis’ reign started in 1999 before coming to an end a year later and his achievement has not been repeated since then.
25 boxers have held all of the heavyweight titles at once and the first ever undisputed heavyweight champion was Jack Dempsey in 1922.
Dempsey’s reign lasted four years before Gene Tunney took the title and it changed hands many times over the next two decades.
Joe Louis is the boxer who has been the undisputed heavyweight champion for the longest, sitting at the top of the sport for 12 years.
Rocky Marciano, Joe Frazier, Buster Douglas, Liston, Foreman, Tyson and Ali are all some huge names who have also held all the available titles.
Here, talkSPORT.com gives you a rundown of all the undisputed heavyweight boxing champions and how long they held the belts for…
Name - Belts - Length of reign
- Jack Dempsey - NYSAC, NBA - July, 1922 to September, 1926
- Gene Tunney - NYSAC, NBA - September 1926 to July, 1928
- Max Schmeling - NYSAC, NBA - June, 1930 to January 1931
- Jack Sharkey - NYSAC, NBA - June 1932 to June 1933
- Primo Carnera - NYSAC, NBA - June 1933 to June 1934
- Max Baer - NYSAC, NBA - June 1934 to June 1935
- James J. Braddock - NYSAC, NBA - June, 1935 to June, 1937
- Joe Louis - NYSAC, NBA - June, 1937 to March, 1949
- Ezzard Charles - NYSAC, NBA - September, 1950 to July, 1951
- Jersey Joe Wollacott - NYSAC, NBA - July, 1951 to September, 1952
- Rocky Marciano - NYSAC, NBA - September, 1952 to April, 1956
- Floyd Patterson - NYSAC, NBA - June, 1960 to September, 1962
- Sonny Liston - NYSAC, WBA - September, 1962 to July 1963
- Sonny Liston - WBC, WBA - July, 1963 to February, 1964
- Muhammad Ali - WBC, WBA - February 1964 to September 1964
- Muhammad Ali - WBC, WBA - February 1967 to April 1967
- Joe Frazier - WBC, WBA - February 1970 to January 1973
- George Foreman - WBC, WBA - January, 1973 to October, 1974
- Muhammad Ali - WBC, WBA - October, 1974 to February, 1978
- Leon Spinks - WBC, WBA - February, 1978 to March, 1978
- Mike Tyson - WBC, WBA, IBF - August, 1987 to February, 1990
- Buster Douglas - WBC, WBA, IBF- February 1990 to October 1990
- Evander Holyfield - WBC, WBA, IBF - October 1990 to November 1992
- Riddick Bowe - WBC, WBA, IBF - November 1992 to December 1992
- Lennox Lewis - WBC, WBA, IBF - November 1999 to April 2000
