World Boxing Organization (as they did with several established champions in the lower weight divisions), the WBO sanctioned a fight between two relatively unknown fighters, Francesco Damiani (winner of the super heavyweight silver medal at the 1984 Summer Olympics) and Johnny DuPlooy, to determine the inaugural holder of its own heavyweight title in 1989. All other sanctioning bodies of boxing recognized the then-undefeated Mike Tyson as the undisputed heavyweight champion. Damiani, meanwhile, went on to become the first WBO heavyweight champion. At heavyweight, especially in the United States, the organization initially struggled to gain credibility as a major sanctioning body, with WBO heavyweight
Light heavyweight Light heavyweight Light heavyweight, or junior cruiserweight, is a weight class in combat sports. In amateur boxing, light heavyweight is a weight division above and up to , falling between middleweight and heavyweight. In professional boxing, the division is above and up to , falling between super middleweight and cruiserweight. The light-heavyweight class has produced some of boxing's greatest champions: Bernard Hopkins (who, upon becoming champion, broke the record for oldest man to win a world title), Tommy Loughran, Billy Conn, Joey Maxim, Archie Moore, Michael Moorer, Bob Foster, Ann Wolfe, Michael Spinks, Dariusz Michalczewski, Roy Jones, Jr., Joe Calzaghe