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 Vitali's retirement, his younger brother had established dominance in the division, winning two of the four world titles available. The reigning WBC Champion was Samuel Peter (who had lost a decision to Wladimir in a thrilling fight in 2005). At the time, there was interest in a potential Peter vs. Wladimir unification match. Instead, Vitali took advantage of his champion emeritus status and secured a title challenge against Peter. The fight was arranged on 11 October 2008 at O2 World, Berlin. It would be one of the most anticipated heavyweight fights in the past few years. Both men had a