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 Heavyweight Champions in history. Despite having a four-year hiatus from the sport, Vitali has proven to be a remarkably effective and dominant Heavyweight Champion once again. Alongside his brother Wladimir, he also fights on for their shared ambition of holding all four Heavyweight Championship belts together, an ambition that was realised on 2 July 2011 when brother Wladimir defeated David Haye to win the WBA Heavyweight Championship. In January 2012, he was awarded WBC Fighter of the Year for 2011. Klitschko was in negotiations for a possible bout with former WBA Heavyweight title holder David Haye on 3 March 2012.