Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko knocks down his challenger Bulgarian Kubrat Pulev during their title fight in Hamburg, November 15, 2014. REUTERS/Morris Mac Matzen
Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko knocks down his challenger Bulgarian Kubrat Pulev during their title fight in Hamburg, November 15, 2014. REUTERS/Morris Mac Matzen