Heavyweight unification series Heavyweight unification series The heavyweight unification series, also known as the Heavyweight World Series, was a sequence of professional boxing matches held in 1986 and 1987 to crown an undisputed champion of the heavyweight class. The series was produced by HBO Sports and promoted by Don King. It ended with Mike Tyson as undisputed champion, holding the championship belts of the International Boxing Federation, World Boxing Association, and World Boxing Council. Prior to the series, the last undisputed heavyweight champion had been Leon Spinks, who won the championship in his 1978 victory over Muhammad Ali. Spinks had been stripped of
World Boxing Super Series World Boxing Super Series The World Boxing Super Series (WBSS) is a professional boxing tournament organised by Comosa AG. Each weight class features eight boxers competing in an annual knockout competition with the champion from each weight class taking the Muhammad Ali Trophy, named after the former heavyweight champion Muhammad Ali, and sharing a total prize fund of US$50 million, with winner of each tournament receiving US$10 million These tournaments are a joint venture between Sauerland Promotions and Richard Schaefer under the Comosa AG banner. The total prize money is $50 million dollars. This is considered the first major professional