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 Kramnik and the two have played, with Kramnik always winning. Vitali has commented that "chess is similar to boxing. You need to develop a strategy, and you need to think two or three steps ahead about what your opponent is doing. You have to be smart. But what's the difference between chess and boxing? In chess, nobody is an expert, but everybody plays. In boxing everybody is an expert, but nobody fights." Vitali and his brother also have been involved in charitable activities dedicated to supporting the needs of schools, churches and children. In 2002, the Klitschko brothers announced that