U.S. National Indoor Championships

For the Memphis Open tournament, see Memphis Open (tennis).
U.S. National Indoor Championships
Defunct tennis tournament
Founded1898
Abolished2014
Location1898 Newton Center, MA
1900–1963 New York, NY
1964–1976 Salisbury, MD
1977–2014 Memphis, TN
United States
Venue1898 Winter Lawn Tennis Club
1900–1963 Seventh Regiment Armory
1941 Oklahoma Coliseum
1964–1976 Wicomico Youth and Civic Center
1977–2014 Racquet Club of Memphis,
SurfaceHard / indoors
ATP Tour
Category500 series (until 2013)
250 series (in 2014)
WTA Tour
CategoryWTA Category 1+ (1987),
WTA Category 2 (1988–1989),
WTA Tier IV (1990–1992),
WTA Tier III (1993–2008),
WTA International (2009–2013)

The U.S. National Indoor Championships was a tennis tournament that was last held at the Racquet Club of Memphis in Memphis, Tennessee, United States. Also known as the U.S. International Indoor Championships. The event was played on indoor hard courts and usually took place in February. For much of its more than 100-year history it was a combined men's and women's tournament but in 2014, its final year, only a men's tournament was held. The event was previously known under various sponsored names including the Memphis Open, the Regions Morgan Keegan Championships, the Kroger St. Jude Championship, and the Volvo Championships. It was called throughout most of its history the National Indoor Championships.