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
Boxing in Wales decade of the 21st century of boxing in Wales was dominated by a single fighter, Joe Calzaghe. Although Calzaghe came to note after beating former Middleweight World Champion Chris Eubank on points in 1997 to win the WBO title, it was during the 2000s that he came to prominence. Calzaghe finished his career with 46 bouts and no losses, one of the few World Champions to retire undefeated. Other boxers of note to emerge during the early 21st century include, Jason Cook who became European Lightweight Champion in 2002, Nathan Cleverly the European, British and Commonwealth light heavyweight title holder,