Wladimir Klitschko is a fighter.
Professional boxing , or prizefighting , emerged in the early twentieth century as boxing gradually attained legitimacy and became a regulated , sanctioned sport . Professional boxing bouts are fought for a purse which is divided between the boxers as determined by contract . Wladimir Wladimirowitsch Klitschko ( Володи́мир Володи́мирович Кличко́ , ; born 25 March 1976 ) is a Ukrainian professional boxer .