The 1915 U.S. National Championships took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York City, New York. The men's singles tournament ran from August 31 until September 8 while the women's singles and doubles championship took place from June 7 to June 12 at the Philadelphia Cricket Club in Chestnut Hill. It was the 35th staging of the U.S. National Championships, the first held at Forest Hills and the second Grand Slam tennis event of the year. US Open 1915: August 31–31, 1915 at West Side Tennis Club (M) Philadelphia Cricket Club (W). Men's singles: William Johnston. Women's singles: Molla Bjurstedt. Wiki link