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. Chris Byrd Vitali Klitschko vs. Chris Byrd Vitali Klitschko vs. Chris Byrd, was a professional boxing match contested on 1 April 2000 for the WBO Heavyweight Championship. After knocking out Herbie Hide to win the WBO belt, Vitali Klitschko had made two stoppage defences against Ed Mahone, and Obed Sullivan. He was ranked 7th in the world by Ring magazine. He had planned to face Donovan Ruddock, however, he pulled out due to a hepatitis infection and Chris Byrd (who had been training for a bout with Lawrence Clay-Bey) stepped in at 10 days notice to take the fight. Klitschko controlled most