Dr. Wladimir Wladimirowitsch Klitschko (Ukrainian: Володимир Володимирович Кличко, Volodymyr Volodymyrovych Klychko); born March 25, 1976 in Semipalatinsk, Kazakhstan) is a Ukrainian heavyweight boxer, former WBO and the current IBF and IBO World Heavyweight Champion. Though a major celebrity in his former adopted home of Germany, in 2004 he moved with his older brother, former heavyweight champion Vitali Klitschko, to Beverly Hills.

Now known as "Dr. Steelhammer" Klitschko first achieved world attention at the 1996 Summer Olympics in Atlanta. He defeated Paea Wolfgramm in the finals for the Super-Heavyweight gold medal. Standing exactly 6' 7"(200 cm) in height, Wladimir is tall, even for a heavyweight, and has a muscular frame.

Klitschko turned professional with Universum Box-Promotion in Hamburg, Germany under the tuteledge of Fritz Sdunek. On October 14, 2000, in Cologne's Kölnarena (Germany), Klitschko won the WBO Heavyweight Championship from American Chris Byrd (who had won it from Vitali six months earlier). After five successful defenses of the WBO belt, Wladimir suffered an upset loss to South African Corrie Sanders on March 8, 2003 in Hannover, Germany. Wladimir was caught by a Corrie Sanders left hand in the first, and barely escaped the round. Wladimir was ultimately knocked down 4 times in total en route to a second round TKO loss.
Source : Wikipedia