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 the referee should have stopped the bout during the last few rounds. Klitschko had retained his belt with official scores of 120–107, 120–105, and 120–107. During the post-fight interview, the American boxer Briggs said: "I've fought George Foreman, I've fought Lennox Lewis, and Vitali's the best." While Klitschko did not knock down Briggs, the latter collapsed after the fight and was hospitalized with facial fractures and a torn biceps. Klitschko's next fight was against mandatory challenger Odlanier Solis. The bout was tentatively scheduled for March 2011. On 11 January, it was officially confirmed that the fight between Klitschko and