The Women's Tennis Association (WTA), founded in 1973 by Billie Jean King, is the principal organizing body of women's professional tennis. It governs the WTA Tour which is the worldwide professional tennis tour for women. Its counterpart organization in the men's professional game is the Association of Tennis Professionals (ATP).
The Women's Tennis Association was founded in the month of June 1973, but traces its origins to the inaugural Virginia Slims tournament, arranged by Gladys Heldman, and held on 23 September 1970 at the Houston Racquet Club in Houston, Texas. Rosie Casals won this first event. The WTA's corporate headquarters is in St. Petersburg, Florida, with its European headquarters in London and its Asia-Pacific headquarters in Beijing.