NEW YORK – SEPTEMBER 04: The sun sets over Louis Armstrong Stadium as Kim Clijster of Belgium plays against Kirsten Flipkens of Belgium during day five of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on September 4, 2009 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
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