Maria Sharapova from Russia serves 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 serves 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 serves 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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