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
Riddick Bowe vs. Jesse Ferguson competition, the much anticipated Bowe–Holyfield rematch was announced to take place on November 6, 1993. Like the previous fight, the two fighters again went the full 12 rounds, this time though, it was Holyfield who would earn the victory, becoming the only man to defeat Bowe in his professional career. Confirmed bouts: Riddick Bowe vs. Jesse Ferguson Riddick Bowe vs. Jesse Ferguson, billed as "The Heavyweight Debate", was a professional boxing match contested on May 22, 1993, for the WBA and "Lineal" Heavyweight championships. The fight took place in RFK Stadium in Washington, DC, was Bowe's second defense of the