The tennis world was rocked today after Maria Sharapova announced that she's failed a drug test.

According to the New York Times, the International Tennis Federation notified the 28-year-old tennis champ that a banned drug was found in her system in January, when she was at the Australian Open.

Sharapova noted the test came back positive for a drug called mildronate. She had been taking the substance since 2006 for what she deemed health issues.

Mildronite wasn't banned until recently, and the World Anti-Doping Agency sent out an email with the announcement.

However, Sharapova cla