World Series of Boxing Like professional boxing, each bout is decided by the scores of three judges or, in some cases, by a knockout, technical knockout or walk-over. A WSB meet between two international franchises consists of bouts in ten (formerly five) weight categories. There are five three-minute rounds in each bout and the team that wins the most number of bouts wins the meet. Until season 4, there were five weight categories which were different than 10 categories in amateur (Olympic) boxing or 17 categories in professional boxing. These were Heavyweight (91+ kg), Light heavyweight (80–85 kg), Middleweight (68–73 kg), Lightweight (57–61 kg)
The distance (boxing) Changes were made in 1926 and 1997 and most recently, in 2000, the International Boxing Association made it four rounds of two minutes each. In professional boxing, until the 1980s, the "championship distance" generally referred to the title rounds that numbered between 13 and 15. For decades, the last heavyweight title match scheduled for less than 15 rounds had been the September 22, 1927 10-rounder between Gene Tunney and Jack Dempsey; from then, the only bout that was not scheduled for 15 rounds had been a "scheduled" 20-rounder between Joe Louis and Abe Simon on March 21, 1941. This changed