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,
Wladimir Klitschko vs. David Haye and Wladimir had wanted to fight Haye. With Vitali wanting to have a fight with Haye in 2010 which never happened. While Haye won the WBA title after defeating Nikolay Valuev. On 16 April 2009, Haye wore a T-shirt depicting him holding the heads of the Klitschko brothers while standing atop their decapitated bodies. At the same time, he declared a war on both the Klitschko brothers, hoping to first defeat Wladimir, then Vitali. Two press conferences were held in announcement of the fight. The first one took place in Hamburg, the second in London. There was also an HBO