Prior to his failed drug test , Povetkin was widely considered as one of the best heavyweights around , having only lost to Wladimir Klitschko .
Povetkin has entered as a signifcant favourite over Stiverne .
Prior to his failed drug test , Povetkin was widely considered as one of the best heavyweights around , having only lost to Wladimir Klitschko , and he has entered as a signifcant favourite over Stiverne .