Maria Sharapova has been banned for two years by the International Tennis Federation after failing a drugs test.
The Russian was provisionally banned in March after testing positive for meldonium at January's Australian Open, a BBC report has said.
The heart disease drug, which 29-year-old Sharapova says she has been taking since 2006 for health issues, became a banned substance on 1 January 2016.
The ITF said the ban would be backdated to 26 January 2016, the day Sharapova provided the positive test.
The World Anti-Doping Agency admitted in April that scientists were unsure how long meldonium stayed in the system, and suggested athletes who tested positive before 1 March could avoid bans, provided they had stopped taking it before 1 January.
However, Sharapova had already admitted she continued taking the substance past that date, saying she was unaware it had been added to the banned list as she knew it by another name - mildronate.