 In America in the 1970s, courts are a common feature of public recreational facilities.Accordingly, in the 1970s the U.S. Open moved from the posh West Side Tennis Club to a public park (the USTA Billie Jean King National Tennis Center, Flushing Meadows Park) that is accessible to anyone who buys a ticket.About the same time, the ruling body's name changed from the United States Lawn Tennis Association to the United States Tennis Association.