Maria Sharapova, the Russian tennis star, received a two-year suspension from international competition for a doping violation this year. Sharapova has appealed that decision, calling it unfairly harsh. On Tuesday, her final penalty will be made public. Here is what you need to know.

How long is Sharapova suspended from professional tennis?

Until Jan. 25, 2018, three months before her 31st birthday.

Why was she suspended, and when did it occur?

She tested positive for a drug called meldonium, both at the Australian Open in January and during an out-of-competition test in Moscow in February. The drug had been recently banned by antidoping regulators, which Sharapova said she had not known.