a bronze medal with his wife in mixed doubles curling as tested positive for a banned substance the international olympic committee is currently we have the results of the tests on his b. sample and the court of arbitration for sport has launched what they call a doping procedure. a heart medication that is once again at the center of a russian doping controversy the over the counter drug can give athletes an edge by boosting stamina in twenty sixteen dhoni and was classified as a banned substance in many sports which led to maria sharapova is fifteen month ban from tennis. after winning a bronze medal with his wife in the mixed curling event alexander crucial netsky tested positive for the drug a fact that has surprised his countryman. yes no. sports me i know that all athletes repeatedly during the season and before their departure underwent doping