Klitschko brothers 5 months & 13 days. Vitali retained the WBC Heavyweight Championship until 15 December 2013, relinquishing his belt in pursuit of his political aspirations in his native Ukraine. The Klitschko brothers jointly run the professional boxing promotion companies ""K2 Promotions"" and ""K2 East Promotions"", as well as the ""Klitschko Brothers Fund"", a charity organization. They appear together on German TV shows and commercials, have a website shared between them, and support each other's training and fights. After Vitali's retirement, Wladimir continued to reign as champion & successfully defend all remaining title belts except for the WBC belt. He eventually lost
Wladimir Klitschko vs. Ruslan Chagaev had beaten Vitali Klitschko in June 2003. Klitschko dominated the fight, with him winning every round on one scorecard, and all but one on the other two. He knocked Chagaev down in the second round and opened a cut over his left eye in the eighth. The fight was stopped after the ninth round. Inmediatly after this bout Chagaev would lose his "Champion In recess" status and would not fight for eleven months. Klitschko would make two defences against Eddie Chambers and a rematch with former WBC champion Samuel Peter, before a unification bout with now WBA beltholder Haye in