The United States Open Tennis Championships is a hard court tennis tournament. The tournament is the modern version of one of the oldest tennis championships in the world, the U.S. National Championship, for which men’s singles and men’s doubles were first played in 1881. Wikipedia
Prize money: US$57 million (2019)
Surface: Grass – outdoors (1881–1974); Clay – outdoors (1975–1977); Hard – outdoors (since 1978)
Founded: 1881
Editions: 139 (2019)
volunteers: 295