The 1958 U.S. National Championships was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York City, New York. The tournament ran from 29 August until 7 September. It was the 78th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year. US Open 1958: August 29 – September 7, 1958 at West Side Tennis Club. Men's singles: Ashley Cooper — 4th major title. Women's singles: Althea Gibson — 5th major title. Wiki link