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 vs. Chris Byrd in October was against the WBO's top contender, and Vitali younger brother Wladimir Klitschko, who avenged his brother loss with a clear decision victory. 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