2018 US OPEN TO CELEBRATE EVENT’S 50TH ANNIVERSARY WITH NEW EVENTS, FREE FAN ACTIVITIES AND A NEW LOUIS ARMSTRONG STADIUM   Completion of $600 Million Transformation of USTA Billie Jean King National Tennis Center   Expanded Fan Week Offerings Bring New Activities to Manhattan and Queens   50th Anniversary to be Celebrated with Special Events and Commemorative … [Read more...] about 2018 US Open to Celebrate 50th Anniversary with New Events, Free Fan Activities and a New Louis Armstrong Stadium