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. Originally, it was scheduled to end with the men's singles final match on Sunday, September 13, but due to rain the tournament was extended by one day. Like the Australian Open, the tournament featured night matches. US Open 2009: August 31 – September 14, 2009 at USTA Billie Jean King National Tennis Center. Men's singles: Juan Martín del Potro. Women's singles: Kim Clijsters — 2nd major title. Wiki link