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 Klitschko's trainer, Fritz Sdunek, entered the ring and stopped the fight. Three years later, Klitschko's brother Vitali stopped Puritty in the 11th round himself. On 18 March 2000, Klitschko fought Paea Wolfgramm, whom he fought previously in the 1996 Super Heavyweight Olympic Finals. In their professional rematch, Klitschko knocked Wolfgramm out in the first round. On 14 October 2000, in Cologne, Germany's Kölnarena, Klitschko won the WBO Heavyweight Championship from American Chris Byrd by a wide unanimous decision by scores of 120–106, 119–107, and 118–108, flooring his opponent twice. Byrd had previously upset his elder brother Vitali (who pulled out