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 face causing a red mark to be left. The next day Chisora spat water over the face of Vitali's brother Wladimir. Vitali won the majority of the rounds boxing a disciplined fight with changing angles and superior footwork. Chisora, constantly coming forward delivering punishing body shots, failed to wear down the older man. The scores were: 118–110, 118–110, and 119–111. The next day Vitali visited a hospital to check his shoulder, claiming he injured it in the fight. A doctor confirmed a ligament tear was suffered in his left shoulder. Klitschko said he "suddenly lost strength in the left hand"