Heavyweight Champions
The heavyweight title is the most prized in boxing, but "the title" is really four separate belts. This guide explains who sanctions them, what unified and undisputed mean, the idea of a lineal champion, and the retired greats who defined the division. For who currently holds each belt, check the live CasinOnline sportsbook.
Four belts, unified and undisputed
Four bodies sanction a world heavyweight title: the WBC, WBA, IBF and WBO. A fighter holding two or more of them is unified; one holding all four at once is undisputed — a rare status reserved for the division's biggest nights. Separately, the lineal champion is "the man who beat the man", traced through an unbroken line of title-winners rather than awarded by a sanctioning body. These distinctions matter when you bet a title fight, because a unification or undisputed bout usually carries higher stakes and tighter matchmaking.
All-time greats and South African history
The heavyweight ranks have produced some of boxing's biggest names — Muhammad Ali, Joe Louis, Mike Tyson, Lennox Lewis, Joe Frazier and George Foreman among them. South Africa has its own chapter: Gerrie Coetzee, "The Boksburg Bomber", won the WBA heavyweight title on 23 September 1983 with a knockout of Michael Dokes, becoming the first African to win a world heavyweight crown, before losing it in his first defence in December 1984. Corrie Sanders added a second-round knockout of Wladimir Klitschko to claim the WBO title in 2003. To gauge fighters across divisions, see our pound-for-pound guide.
Frequently asked questions
What is the difference between unified and undisputed?
Unified means holding two or more of the four major belts. Undisputed means holding all four — WBC, WBA, IBF and WBO — at the same time, which is rare and usually tied to the division's biggest fights.
What is a lineal champion?
The lineal champion is "the man who beat the man" — the title is passed directly from one champion to whoever beats them, rather than awarded by a sanctioning body. It can differ from the belt holders at any given time.