The world's best tennis players show their intensity on the clay courts at Roland Garros during the 2013 French Open in Paris.
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American Serena Williams reacts after a shot during her French Open women's third round match against Sorana Cirstea of Romania at Roland Garros in Paris on May 31, 2013. Williams defeated Cirstea 6-0, 6-2. UPI/David Silpa
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