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
Klitschko brothers down, Vitali Klitschko is widely regarded as the tougher fighter of the two. In fact, Vitali is the only heavyweight world champion to have never been knocked down in any fight, and alongside George Foreman he is the only heavyweight boxer in history to defend a world title after turning 40. Furthermore, his 87% knockout percentage is one of the best knockout-to-fight ratios of any champion in heavyweight boxing history. Vitali was also known for being unusually dominant in his fights, having almost never lost a round in his professional career as a boxer. During his time as WBC champion,