Undisputed championship (boxing)
Boxer who holds world titles from all major organizations / From Wikipedia, the free encyclopedia
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In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all recognized major organisations[1][2] by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 19 boxers (9 males and 10 females) to hold all four titles simultaneously.