1881: U.S. Open

The U.S. National Men's Singles Championship, now the U.S. Open, was first held in 1881 at Newport, Rhode Island. The U.S. National Women's Singles Championships were first held in 1887. On 21 May 1881, the United States National Lawn Tennis Association (now the United States Tennis Association) was formed to standardize the rules and organize competitions.

Name change 1881: U.S. National Championship 1968: U.S. Open

Surface change 1881: Grass 1975: Clay Har-Tru 1978: Hard DecoTurf

Venue change 1881: Newport 1915: Forrest Hills 1921: Philadelphia 1924: Forrest Hills 1978: Flushing Meadows