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Maria Sharapova of Russia reaches for a forehand return against Flavia Pennetta of Italy during their 4th round match at the BNP Paribas Tennis Open in Indian Wells, California on March 17, 2015. Pennetta defeated Sharapova 3-6, 6-3, 6-2. AFP PHOTO/ FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Maria Sharapova of Russia reaches for a forehand return against Flavia Pennetta of Italy during their 4th round match at the BNP Paribas Tennis Open in Indian Wells, California on March 17, 2015.  Pennetta defeated Sharapova 3-6, 6-3, 6-2. AFP PHOTO/ FREDERIC J. BROWN        (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)