Former tennis world number one Maria Sharapova says she has failed a drugs test at the Australian Open.
She says it's because a rule change at the start of January banned a substance that she has been taking in medicine since 2006.
Sharapova says she's not been informed about any punishment and hopes she'll be able to play again.
The Russian has won five grand slam titles, including Wimbledon 12 years ago.
Sharapova told a press conference she took the drug because she feared she was developing diabetes:
