Wladimir Klitschko world heavyweight champion) dominated heavyweight boxing, a period typically known as the "Klitschko Era" of the division. Klitschko was born in Semipalatinsk (now Semey), Kazakh SSR, Soviet Union (now Kazakhstan). His father, Vladimir Rodionovich Klichko (1947–2011), was a Soviet Air Force major general and a military attaché of Ukraine in Germany; he was also one of the commanders in charge of cleaning up the effects of the Chernobyl disaster in 1986 and was afterward diagnosed with cancer. Wladimir's mother is Nadezhda Ulyanovna. He is the younger brother of former WBC, WBO and Ring magazine heavyweight champion Vitali Klitschko, the current
Vitali Klitschko his own. After the Johnson bout, Klitschko's camp began negotiations for a potential fight with former WBA Champion Nikolai Valuev, but the match failed to materialize due to economic disagreements. On 29 May 2010, Vitali Klitschko defeated Polish heavyweight contender Albert Sosnowski by KO at 2:30 in round 10 of 12. Sosnowski was knocked down by a right hand in the 10th round, prompting referee Jay Nady to immediately wave off the fight. The fight took place at Veltins-Arena, Gelsenkirchen, Nordrhein-Westfalen, Germany. Vitali Klitschko weighed in at 112 kg (247 lbs), while Sosnowski weighed in at 110 kg (242.5 lbs).