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
Jack Dempsey vs. Georges Carpentier Boxing Hall of Fame. Jack Dempsey vs. Georges Carpentier Jack Dempsey versus Georges Carpentier was a boxing fight between world heavyweight champion Jack Dempsey and world light-heavyweight champion Georges Carpentier, which was one of the fights named the "Fight of the Century". The bout took place in the United States on Saturday, July 2, 1921, at Boyle's Thirty Acres in Jersey City, New Jersey. Jack Dempsey was the world Heavyweight champion since he beat Jess Willard by a fourth round knockout in 1919. The challenge by Carpentier would be his third title defense, after retaining the championship against Billy Miske