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<p>LONDON, ENGLAND - JULY 11: Serena Williams of the United States celebrates winning a point in the Final Of The Ladies' Singles against Garbine Muguruza of Spain during day twelve of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 11, 2015 in London, England. (Photo by Julian Finney/Getty Images)</p>
PARIS (AP) — Serena Williams has called off her Grand Slam comeback, pulling out of the French Open because of a chest injury before she was supposed to play Maria Sharapova.
Williams announced her withdrawal at a news conference at Roland Garros on Monday.
Williams' voice quivered as she said she can't serve because of a problem with her tight pectoral muscle.
She and Sharapova were scheduled to play a fourth-round match Monday.
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