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 vs. Dereck Chisora Klitschko his most competitive fight since his defeat to Lennox Lewis in 2003. Chisora also became only the fourth man (after Tino Hoffmann, Kevin Johnson and Shannon Briggs), to take Klitschko the full twelve round distance. In the post match press conference, Chisora was involved in a controversial confrontation with fellow British boxer David Haye, which subsequently paved the way for the pair's own grudge match later in the year. Vitali Klitschko vs. Dereck Chisora Vitali Klitschko vs. Dereck Chisora billed as Showdown in Munich was a heavyweight championship fight for the WBC title. The bout took place at the