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 champion of all time, has the fifth longest combined world championship reign in history at 2,735 days, the third longest individual WBC heavyweight title streak of all time at 9 consecutive defenses and the 4th longest combined title streak in the modern heavyweight history at 15 title bouts. He held the WBO title from 1999 to 2000; the "Ring" magazine title from 2004 to 2005; and the WBC title twice, from 2004 to 2005 and from 2008 to 2013. Standing at 2.01 metres (6 feet 7 inches), Klitschko was renowned for having exceptional ring dominance. With an 87% knockout