Klitschko brothers represented Ukraine at the 1996 Olympics, winning a gold medal in the super-heavyweight division. In 1996, when still an amateur, Vitali Klitschko tested positive for a banned substance and was removed from the Ukrainian boxing team. In June 1999, Vitali Klitschko won the WBO Heavyweight title from Herbie Hide via second-round knockout. He successfully defended the title twice before losing it to Chris Byrd. Six months later, younger brother Wladimir dethroned Byrd via lopsided points decision. He registered five successful title defenses, all by TKO until suffering an upset TKO loss to Corrie Sanders in March 2003. Vitali Klitschko lost
Vitali Klitschko percentage, he holds one of the highest knockout-to-fight ratios of any world champion in heavyweight boxing history, while also possessing a highly durable chin. His two losses came via a shoulder injury and a deep cut above his eye, both of which were recorded as stoppages rather than outright knockouts; in both fights he was leading on the judges' scorecards. Klitschko is the only heavyweight boxer to have reigned as world champion in three different decades. Along with Oliver McCall, he is also the only world heavyweight champion to have never been knocked down in any fight. Klitschko and George