Undisputed champion he was still described as "undisputed champion" by some reports. After Joe Calzaghe's super middleweight victory over Mikkel Kessler in November 2007, he was frequently described as "undisputed champion". Others disputed this, because although he held the WBA, WBC, and WBO belts, he vacated his IBF title in November 2006 rather than face a mandatory challenger, and immediately vacated other titles as well. The unified champion is defined as a boxer that holds at least two world championships of major sanctioning bodies (WBA, WBC, WBO or IBF) in their respective division. Around 2004, the World Boxing Association recognized three different
World Boxing Super Series World Boxing Super Series The World Boxing Super Series (WBSS) is a professional boxing tournament organised by Comosa AG. Each weight class features eight boxers competing in an annual knockout competition with the champion from each weight class taking the Muhammad Ali Trophy, named after the former heavyweight champion Muhammad Ali, and sharing a total prize fund of US$50 million, with winner of each tournament receiving US$10 million These tournaments are a joint venture between Sauerland Promotions and Richard Schaefer under the Comosa AG banner. The total prize money is $50 million dollars. This is considered the first major professional