The USTA Billie Jean King National Tennis Center is an American stadium complex located in the Flushing Meadows–Corona Park in Queens, New York City, which has been the home of the US Open Grand Slam tennis tournament played every year in August and September since 1978. It is operated by the United States Tennis Association (USTA). The facility has 22 courts inside its 46.5 acres and 11 in the adjoining park.