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
The Johnson-Jeffries Fight The Johnson-Jeffries Fight The Johnson-Jeffries Fight is a 1910 American film report on the heavyweight championship boxing fight between Jack Johnson and James J. Jeffries in Reno, Nevada. The footage depicts the heavyweight championship that took place in Reno, NV on July 4, 1910, when reigning champion Jack Johnson, a black American, knocked out former champion James J. Jeffries, a white American, in the fifteenth round of a very one-sided fight. The fight was already a media sensation weeks before it happened and was dubbed "The Fight of the Century". This sparked motivation to film the event as it was