U.S. Open 2011

Associated Press
FILE - In this Aug. 18, 2012, file photo, Novak Djokovic, from Serbia, hits a forehand shot against Juan Martin del Potro, from Argentina, during a semifinal match at the Western & Southern Open tennis tournament in Mason, Ohio. Fans can look forward to a variety of grunts, shrieks and hoots as the start of the U.S. Open tennis tournament approaches on Monday, Aug. 27, in New York. Noisemaking competitors have stirred reactions from tennis enthusiasts and opposing competitors alike, causing governing bodies to look for ways to regulate the sound level. The Associated Press takes a look at offenders past and present, the hindrance rule, and how to tame the grunters. (AP Photo/Al Behrman, File)

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The U.S. Open is underway in Flushing Meadows, New York.

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