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 vs. Dereck Chisora Vitali Klitschko vs. Dereck Chisora Vitali Klitschko vs. Dereck Chisora billed as Showdown in Munich was a heavyweight championship fight for the WBC title. The bout took place at the Olympiahalle in Munich, Germany on 18 February 2012. Klitschko won via a unanimous points decision after the full twelve rounds to retain his title. Vitali Klitschko had first become a heavyweight champion in 1999, when he picked up the WBO title for knocking out Herbie Hide. In his third defence against Chris Byrd, Klitschko was forced to retire from the fight with a shoulder injury at the end of the