Weight class (boxing) names of the new divisions are not standardized between different sanctioning bodies, although the cutoff weights are. These weights are specified in pounds, reflecting the historic dominance of Britain (and, later, America) in the sport. A nonstandard weight limit is called a "catchweight". A catchweight may be agreed to for an individual bout—sometimes even for a championship bout—but championships are awarded only at the standard weight classes. For example, when Manny Pacquiao fought Antonio Margarito at a catch-weight of 150 pounds, the World Boxing Council sanctioned this as a title fight for jr. middleweight, whose limit is 154 pounds. This
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