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

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