The United States Open Tennis Championships is a hardcourt tennis tournament which is the modern version of one of the oldest tennis championships in the world, the U.S. National Championship, for which men's singles was first contested in 1881.
The United States Open Tennis Championships is a hardcourt tennis tournament. This hardcourt tennis tournament is the modern version of one of the oldest tennis championships in the world. The world is the U.S. National Championship. Men's singles was first contested in 1881 for the world. The world was the U.S. National Championship.