Sharapova on Monday officially withdrew from the season-ending WTA Championships because of the injury. She's played just three matches since a loss in the French Open final.
"I am very disappointed that I will not be able to play in the TEB BNP Paribas WTA Championships this year," Sharapova said in a statement on her website. "The fans in Istanbul have welcomed us each year with such intense passion and warmth, I will sincerely miss the energy and excitement they brought to the year-end tournament.
"I want to thank Istanbul for being a tremendous host and hope to play in Turkey sometime in the future."
Sharapova was beaten in the second round of the Wimbledon Championships and dropped a second-round match -- after a first-round bye -- in Cincinnati. She missed the U.S. Open entirely.
After the loss at Wimbledon, she fired coach Thomas Hogstedt and was for a very short time coached by Jimmy Connors.
Sharapova ends the year with a 37-7 record and two tournament titles. She won at Stuttgart, Germany, in April and at Indian Wells, Calif., in March. Three of her 2013 losses were to world No. 1 Serena Williams in tournament finals, including at the French Open.
Sharapova, who was the runner-up to Williams in the WTA Championships last year, had qualified for this year's WTA Championships, which are scheduled for later this month. Williams and Victoria Azarenka also earlier qualified.
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