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). Jerry Diamond of San Francisco became Executive Director of the WTA in 1974 and remained until 1985. He is considered the creator the Women's Point System for ranking players.
The Women's Tennis Association can trace its origins back to Houston, Texas with the inaugural Virginia Slims tournament, arranged by Gladys Heldman, and held on 23 September 1970. Rosie Casals won this first event. The WTA's corporate headquarters is in St. Petersburg, Florida. The European headquarters is in London, and the Asia-Pacific headquarters is in Beijing.