Heavyweight contender Alexander Povetkin (30-1, 22 KOs) has failed a drugs test ahead of his world title fight against American Deontay Wilder (36-0, 35 KOs).
The Russian is scheduled to challenge WBC champion Wilder at the Megasport Arena in Moscow on May 21, but Povetkin tested positive for the banned substance meldonium and the heavyweight bout is now in doubt.
Meldonium – the same drug found in tennis star Maria Sharapova’s sample at the Australian Open – was added to the banned…