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 that he would take part in the (early) 2014 Ukrainian presidential election. But on 29 March 2014 announced that he had changed his mind and would run for the post of Mayor of Kiev in the 2014 Kiev local election (including Mayoral elections) set for 25 May 2014. In the 2014 Ukrainian presidential election Klitschko endorsed the candidacy of Petro Poroshenko. Klitschko won Kiev's mayoral elections with almost 57% of the votes. He was sworn in as mayor on 5 June 2014. The same day the Ukrainian parliament had deprived Klitschko of his MP mandate (Ukrainian MPs are not entitled