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
Vitali Klitschko This voluntary defense was Vitali's 4th defense of the WBC Heavyweight title. Sosnowski was the No. 11 ranked heavyweight according to the WBC prior to this bout. On 17 August 2010, it was announced that Klitschko would defend his WBC title against Shannon Briggs on 16 October of that year. Klitschko completely dismantled his challenger with superior hand speed. Briggs struggled to land any meaningful punches, as Klitschko won every round decisively. After a few rounds, Briggs was receiving a vicious and sustained beating which caused him serious facial injuries. Considering the beating he was receiving, there was some suggestion