World TeamTennis (WTT) was a mixed-gender professional tennis league played with a team format in the United States, which was founded in 1973.

[1] Many top tennis players have participated in the league over the years, including Billie Jean King, Rod Laver, Björn Borg, Ilie Nastase, Chris Evert, John McEnroe, Evonne Goolagong, Jimmy Connors, Martina Navratilova,[2] Andre Agassi, Pete Sampras, Michael Chang, Serena Williams, Venus Williams, Lindsay Davenport, Kim Clijsters, Martina Hingis, John Isner, Sam Querrey, Sloane Stephens, Naomi Osaka, and Frances Tiafoe.

The original league format included a four-colored tennis court, a 44-contest season, and teams of at least two men and two women.

For much of World Team Tennis' history, its distinct court was an instant symbol for fans to recognize what they were watching.

[4] These colors were chosen to represent the different tennis court surfaces: green for grass, blue for hard, maroon for clay and brown for dirt.

[6] In 2019, the league made efforts to modernize and update its look and branding, including a switch to a deep blue playing surface and gray outer court.

[7] WTT was founded in 1973 by Dennis Murphy, Dick Butera, Fred Barman, Jordan Kaiser, and attorney and promoter Larry King, each of whom organized and owned the various participating teams of the fledgling professional tennis league.

Murphy had previously founded the World Hockey Association, and gave a number of WHA club owners preferential options on WTT franchises.

Knowledge"),[8] industrialist John H. Hillman III, and lawyer William "Bill" Sutton, who became the owners of the Pittsburgh Triangles, had, in 1972, founded the similar National Tennis League (NTL), a forerunner to WTT and Reichblum's brainchild.

Dr. Leonard Bloom, Arthur Ashe, and Wilt Chamberlain helped to secure the professional men tennis players.

[11][12] Connors' exclusion from the French Open denied him the opportunity to become the first male player since Rod Laver to win all four Major singles titles in a calendar year.

The Western Division consisted of the Gulf Plains Section: Chicago Aces, Florida Flamingos, Houston E-Z Riders, Minnesota Buckskins; and the Pacific Section: Denver Racquets, Hawaii Leis, Los Angeles Strings, San Francisco Golden Gaters.

[13] The teams that played from 1974 to 1978 were: WTT was the first professional sports experience for Jerry Buss (eventual owner of the NBA's Los Angeles Lakers and the NHL's Los Angeles Kings), and for Bob Kraft (eventual owner of the NFL's New England Patriots and MLS's New England Revolution).

[17] Tom Okker (San Francisco) and Dianne Fromholtz (Los Angeles) won MVP honors that year.

In the 1977 All Star Game held at the San Diego Sports Arena, Björn Borg (Cleveland–Pittsburgh) and Betty Stöve (Seattle–Portland) captured MVP awards as the East bested the West, 23–18.

In March 2019, the league announced its expansion to eight teams for the 2019 season, with the creation of the Orlando Storm and the Vegas Rollers.

The league committed to play the entirety of its 45th season at The Greenbrier in White Sulphur Springs, West Virginia from July 12 through August 2.