The 1931 U.S. National Championships (now known as the US Open) 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.
Ellsworth Vines defeated George Lott 7âÂÂ9, 6âÂÂ3, 9âÂÂ7, 7âÂÂ5
Helen Wills Moody defeated Eileen Bennett Whittingstall 6âÂÂ4, 6âÂÂ1
Wilmer Allison / John Van Ryn defeated Gregory Mangin / Berkeley Bell 6âÂÂ4, 8âÂÂ6, 6âÂÂ3
Betty Nuthall / Eileen Bennett Whittingstall defeated Helen Jacobs / Dorothy Round 6âÂÂ2, 6âÂÂ4
Betty Nuthall / George Lott defeated Anna McCune Harper / Wilmer Allison 6âÂÂ3, 6âÂÂ3