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 Association by other WBA-ranked boxers. As a result, the WBA's official list of champions will often show a "WBA Super World Champion" and a "WBA World Champion" for the same weight class, instead of simply "WBA Champion." The WBA has even been known to recognize three different fighters as one form of champion or another in the same weight class ("Super", "Regular", and "interim champion"), and there have been occasions where two different WBA "World" champions have defended their own versions of the same title, in the same weight class, on the same night, in two different parts of the world.