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,
Vitali Klitschko heavy shot in round one by Sanders and almost knocked down right at the end of the round, but by using upper-body movement and accurate punching he broke down Sanders over the following rounds, forcing referee Jon Schorle to stop the bout in the eighth. Vitali landed 60% of his power punches. Klitschko's first WBC title defense was against British boxer Danny Williams. Williams had become suddenly marketable from a KO over Mike Tyson in round 4. Klitschko scored a technical knockout against Williams in 8 rounds on 11 December 2004, while wearing an orange cloth to show support for