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Maria Sharapova will have to wait until September to learn the outcome of his appeal against a two-year doping ban, ruling her out of the Rio Olympics.
Sharapova was handed a two-year ban after testing positive for the drug meldonium at January's Australian Open, with the suspension backdated to January 26th.
She filed an appeal with CAS but the Russian and the International Tennis Federation have asked for more time to prepare their cases with a decision postponed until September.
As a result, she will miss the Rio Olympics.
"Maria Sharapova and the International Tennis Federation (ITF) have agreed to defer the Cas decision until September 2016," said a statement.
"A decision is expected to be issued by 19 September 2016."
Meldonium, which has been banned since the beginning of 2016, is contained in Mildronate which the 29-year-old Russian said she had been taking for many years to treat magnesium deficiency and potential signs of diabetes.