The 2015 US Open was a tennis tournament played on outdoor hard courts. It was the 135th edition of the US Open, the fourth and final Grand Slam event of the year. It took place at the USTA Billie Jean King National Tennis Center. US Open 2015: August 31 – September 13, 2015 at USTA Billie Jean King National Tennis Center. Men's singles: Novak Djokovic — 10th major title. Women's singles: Flavia Pennetta. Wiki link