Five-time Grand Slam champion and Russian tennis player, Maria Sharapova, tested positive for meldonium, medication used to treat ischaemia: a lack of blood flow to parts of the body. She claims she has been taking it since 2006 for health issues.
She announced this at a press conference yesterday where she admitted using the drug, though she said she wasn't aware it was on the banned list.
John Robbie spoke to Sports Physician, Dr Jon Patricios about the banned substance that has lead to Sharapova's provisional suspension from tennis.
Listen to the conversation below: