The United States Tennis Association (USTA) is the national governing body for tennis in the United States, responsible for organizing and promoting the sport at all levels, from grassroots programs to professional competitions. Founded to standardize rules and regulations, the USTA invests all its proceeds into developing tennis nationwide, supporting over 700,000 individual members and more than 8,000 organizational members, including tennis clubs and parks. It sanctions thousands of tournaments annually and owns and operates the Billie Jean King National Tennis Center in Flushing Meadows, New York, which hosts the US Open, one of the four Grand Slam tennis events. The organization also focuses on inclusivity, youth development, and adaptive tennis programs to broaden participation across diverse communities. Historically, the USTA evolved from efforts to unify tennis governance in the late 19th century, playing a pivotal role in the sport's professionalization and the establishment of major championships. It has been instrumental in landmark moments, such as the 'Battle of the Sexes' match in 1973 and advocating for equal prize money at the US Open, achieved in 1973. Beyond competitions, the USTA engages in education, coaching certification, and facility development, partnering with schools and communities to grow the sport. While primarily a not-for-profit entity, it faces occasional controversies related to event management, inclusivity initiatives, and leadership decisions, but remains a cornerstone of American tennis infrastructure.