Undisputed champion recognised a different champion. The disputes were usually short-lived as a lucrative fight would be organised between the rival champions. The longest split was ten years, of the middleweight title, between Mickey Walker's move up to heavyweight in 1931 and NBA champion Tony Zale's defeat of NYSAC contender Georgie Abrams in 1941. An early use of "undisputed" appears in a "New York Times" preview of the 1941 fight. The growing popularity of boxing outside of the USA led to creation of various boxing organizations, each strengthening their influence (most notably BBBofC) and having their own champion. This resulted in a
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.