Well you did time it right in so far as the ball contacting the player, but I'd 'bin' that one if it were mine. It's not focused on the subject and it's very unflattering to the poor young girl being struck by the ball. Doesn't do much to convey the joy of kids playing the game.
If it's older kids or adults, that type of shot is more acceptable to me, but this is not one I'd show off.
Just my one single opinion.
Canon 20D w/grip, 300D, Powershot SX100 w/HF-DC1 flash, Canon 70-200 f/2.8L, 85 f/1.8, 17-55 f/2.8 IS, 50 f/1.8, 580EX and some other stuff...