Russian tennis player Maria Sharapova speaks at a press conference in Los Angeles, on March 7, 2016. The former world number one announced she failed a doping test at the Australian Open, saying a change in the World-Anti-Doping Agency banned list led to the violation.Sharapova said she tested positive for Meldonium, a substance she had been taking since 2006 but one that was added to the banned list this year. (Photo by ROBYN BECK / AFP via Getty Images)