text: The 2009 US Open was a tennis tournament played on outdoor hard courts , held from August 31 to September 14 , 2009 in the USTA Billie Jean King National Tennis Center at Flushing Meadows , New York City , United States .
simplified: The 2009 US Open was a tennis event played on an outdoor hard courts , held between August 31 and September 14 2009 at the USTA Billie Jean King National Tennis Center in Flushing Meadows , New York City , New York , United States .