1931 U.S. National Championships (tennis)
The 1931 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 September 3 until September 10. It was the 51st staging of the U.S. National Championships and the fourth Grand Slam tennis event of the year.
Finals
Ellsworth Vines defeated George Lott 7–9, 6–3, 9–7, 7–5
Helen Wills Moody defeated Eileen Bennett Whittingstall 6–4, 6–1
Wilmer Allison / John Van Ryn defeated Gregory Mangin / Berkeley Bell 6–4, 8–6, 6–3
Women's doubles
Betty Nuthall / Eileen Bennett Whittingstall defeated Helen Jacobs / Dorothy Round 6–2, 6–4
Betty Nuthall / George Lott defeated Anna McCune Harper / Wilmer Allison 6–3, 6–3