SportsKlitschko - taking on doping01:39This browser does not support the video element.Sports05/10/2018May 10, 2018Vladimir Klitschko was a dominant figure in the world of boxing for the better part of 20 years, 12 of those as reigning world heavyweight champion. Now he's ready to take on his next opponent - doping, as he told DW in an exclusive interview.Copy linkAdvertisement