2013 U.S. Open - Day 13

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Kate Upton watches the men's singles semifinal match between Novak... News PhotoAdult,Arts Culture and Entertainment,Day 13,Flushing - Queens,Grand Slam,Horizontal,Individual Event,Kate Upton,Men,New York City,Novak Djokovic,Queens - New York City,Residential District,Semifinal Round,Serbia,Sport,Stanislas Wawrinka,Switzerland,Tennis,US Open Tennis Championships,USA,USTA National Tennis Center,WatchingPhotographer Collection: Getty Images Sport 2013 Getty ImagesNEW YORK, NY - SEPTEMBER 07: Kate Upton watches the men's singles semifinal match between Novak Djokovic of Serbia and Stanislas Wawrinka of Switzerland on Day Thirteen of the 2013 US Open at USTA Billie Jean King National Tennis Center on September 7, 2013 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)