So you want to be a pro ballboy?

 
Good news, Kramer: there is no maximum age listed.

Prospective ballkids [Ed: note politically correct alteration of the universal "ballboy" term] should watch this year's workers, especially on Center Court, to see how they react to different score lines. For example, when the cumulative score of a set is an odd number (1-0, 2-1, 3-0, 4-3, etc.), the tennis balls do not change sides. But when the score is an even number (1-1, 2-0, 3-3, 4-2, etc.), ballkids must roll the tennis balls from one backdrop to the other...

What the... ? I had no idea it was that complicated. Forget it.