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Tennis player Maria Sharapova faces being banned from the sport for failing a drugs test. The highest paid sportswoman in the world says she has been taking meldonium for health issues for 10 years and did not know it was banned. Meldonium boosts metabolism and endurance. One of her sponsors, Nike, say they will halt their relationship with her pending an investigation. Â鶹Éç Newsday's Tom Hagler and Nkem Ifejika spoke to Jeff Tarango, Maria Sharapova's former coach and asked him if he believes the explanation she gave. (Photo: Maria Sharapova Credit: Getty Images)