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 technical knockout. Negotiations for a 6 December rematch began. After negotiations collapsed, Vitali defeated Kirk Johnson in a WBC Eliminator bout on 6 December date, setting up a mandatory rematch with Lewis. In January 2004, the WBC announced that it would strip Lewis of the belt if he let pass a 15 March deadline to sign for a rematch with Vitali. Shortly thereafter, Lewis announced his retirement and vacated the title. For years after this fight, Klitschko would still occasionally call out Lewis, despite the fact that Lewis has been retired since early 2004, for a rematch. Around this time