Tickets for the US Open can be purchased four ways:
1) at USOpen.org
2) by calling Ticketmaster at 1-866-OPEN-TIX
3) at all Ticketmaster outlets
4) at the USTA Billie Jean King National Tennis Center box office.
American Express is the Official Card of the US Open.
LEGAL NOTICE: http://bit.ly/12Duo5V