Wladimir Klitschko Universum Box-Promotion in Hamburg under the tutelage of Fritz Sdunek, often being featured on fight cards alongside his elder brother Vitali. After building an undefeated record of 24–0 with 22 KOs, he suffered his first loss to 24–13–1 Ross Puritty, in what was Klitschko's first and only professional fight in Ukraine. Puritty forced Klitschko, who had at that time not gone beyond 8 rounds, to punch himself out. Klitschko began to be overwhelmed in the 10th round and went down twice but was allowed to continue. At the start of the 11th round, with Puritty continuing to land hard punches,
Lennox Lewis vs. Vitali Klitschko looked exhausted, often staggering after coming together. Between rounds six and seven, it was determined by the ringside doctor that the damage to Klitschko's eye had become too severe and the fight was stopped. Because Klitschko's injury was a result of punches from Lewis, Lewis was named the winner of the fight by technical knockout. Klitschko was ahead 58-56 on the scorecards with two judges giving Lewis only rounds three and six and the other rounds five and six. The crowd proceeded to boo Lewis, and cheer Klitschko, presumably unhappy with the stoppage. Due to the controversial ending, there was