Maria Sharapova from Russia returns a ball to Na Li from China during the final of the WTA tennis Porsche GP in Stuttgart, Germany, Sunday, April 28, 2013. (AP Photo/Daniel Maurer)

Associated Press
Maria Sharapova from Russia returns a ball to Na Li from China during the final of the WTA tennis Porsche GP in Stuttgart, Germany, Sunday, April 28, 2013. (AP Photo/Daniel Maurer)
Maria Sharapova from Russia returns a ball to Na Li from China during the final of the WTA tennis Porsche GP in Stuttgart, Germany, Sunday, April 28, 2013. (AP Photo/Daniel Maurer)
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