Russian star boxer Sergei Kovalev fails a doping test before the fight against undefeated Uzbek Bektemir Melikuziev.

RUSSIAN BIATHLONIST DISQUALIFIED FOR DOPING: DETAILS OF A SCANDAL Synthetic testosterone was found in the body of a 37-year-old light heavyweight. The upcoming fight, which was supposed to take place on January 30, is likely to be canceled, writes BoxingScene.

The promoter of the Russian, Katie Duva, has already announced that her client will require an autopsy of the B sample, as she assures that he deliberately did not take illegal drugs..

Kovalev spent 39 fights in the professional ring, scored 34 victories and suffered 4 losses. Another fight with his participation ended in a draw.

Earlier Sergey held the titles of the WBO, WBA Super and IBF world champion.