Maria Sharapova was suspended for two years by the International Tennis Federation on Wednesday, a result of her testing positive for the banned substance meldonium, a blood-flow boosting drug.
Sharapova can appeal to the Court of Arbitration for Sport.
She had been provisionally suspended since March after testing positive at the Australian Open in January. Sharapova said she had used meldonium since 2006 but was unaware the World Anti-Doping Agency banned it on Jan. 1.
Sharapova announced on March 7 that she failed a drug test at the Australian Open.
"I take great responsibility and professionalism in my career every day," Sharapova said in March.