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The Women's Tennis Association (WTA) 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). For more details see -.
The United States Tennis Association is the national governing body for tennis in the United States. A not-for-profit organization with more than 700,000 members, it invests 100% of its proceeds to promote and develop the growth of tennis, from the grass-roots to the professional levels. The association was created to standardize rules and regulations and to promote and develop the growth of tennis in the United States. The USTA runs the USTA Billie Jean King National Tennis Center which hosts t