According to the USOpen.org website Rafa Nadal will be apart of Arthur Ashe Kids Day. You can purchase tickets here. For a Complete line-up go here

Plus see exciting tennis matches and contests with world No. 1 Rafael Nadal, Roger Federer, Andy Roddick, Novak Djokovic, reigning US Open champion Kim Clijsters and wheelchair tennis superstar Esther Vergeer.

For more info on Arthur Ashe Kids Day please visit the official site http://usta.usopen.org/ArthurAsheKidsDay/