PRINCE Wimbledon Ball Count Sweepstakes
http://www.princetennis.com/tennis/princetennisballguess/#/make-a-guess
3) PRIZES:
One Grand Prize – awarded to the person who guesses the exact/or closest number of tennis balls without going over in said container
a. (1) Autographed Prince racquet signed by Maria Sharapova. Approximate Retail Value of prize is $300.