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epa03380908 Stanislas Wawrinka of Switzerland reacts after winning the first set against Alexandr Dolgopolov of Ukraine during their match on the seventh day of the 2012 US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 02 September 2012. The US Open runs through Sunday 09 September 2012. EPA/JASON SZENES