Amid U.S. Open Fanfare, U.S.T.A. Fights Questions of Its Handling of Sexual Abuse - The New York Times
The Hardest Ticket at the U.S. Open? Ball Person. - The New York Times
2007 – The Year of the Ball. The Paddle Company introduced new balls and Wilson Racquet Sports re-entered the market
Best Tennis Balls: The Top Picks for Your Next Match
Tourna Pressureless Tennis Ball 60 Count (Pack of 1),Yellow : Tennis Balls : Sports & Outdoors
Why Do Tennis Players Check The Balls Before Serving? - My Tennis HQ
The Tennis Ball Toss: Breaking Down this Critical Aspect of the Serve - The New York Times
What happens to the 12,000 balls after W&S Open?
Wimbledon Tennis Balls: How many they use and what they do to them?
Serve (tennis) - Wikipedia
Review: In 'Balls,' Billie Jean and Bobby Come Out Swinging - The New York Times