Wladimir Klitschko is a fighter.
Wladimir Wladimirowitsch Klitschko ( Володи́мир Володи́мирович Кличко́ , ; born 25 March 1976 ) is a Ukrainian professional boxer . He is a former world heavyweight champion of three major sanctioning bodies , having held the titles of the WBA , IBF , and WBO ( twice ) ; additionally he has held the IBO , Ring magazine , and lineal heavyweight titles . Until his defeat by Tyson Fury in 2015 , Klitschko was also recognized as champion by the Transnational Boxing Rankings Board , while the WBA recognized him as one of its `` Super champions '' , a distinction given to boxers who hold that title in addition to those by other sanctioning bodies in the same division .