The Russian wore a bandage on her right shoulder and wasted three match points in the second set before being taken to a third set.
Sharapova hadn’t played a singles match on tour since July 30. She had surgery on a torn rotator cuff about two months later. She played a doubles match in March, losing in Indian Wells, Calif.
The three-time Grand Slam tournament winner and former No. 1 player is now ranked No. 126. She has missed the last two majors.
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