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 heavyweight champion of all time, has the fifth longest combined world championship reign in history at 2,735 days, the third longest individual WBC heavyweight title streak of all time at 9 consecutive defenses and the 4th longest combined title streak in the modern heavyweight history at 15 title bouts. He held the WBO title from 1999 to 2000; the "Ring" magazine title from 2004 to 2005; and the WBC title twice, from 2004 to 2005 and from 2008 to 2013. Standing at 2.01 metres (6 feet 7 inches), Klitschko was renowned for having exceptional ring dominance. With an 87% knockout