Originally Posted by Chemist
It's almost impossible to hit a x-court flat shot to the side T, especially for a 9 yr old. You can put a cone at the side T, toss balls to him 1-2' from the corner of the deuce or add court and ask him to nail the cone x-court. You will see that he needs spin to hit it. The side T is a good target for x-court passing shot, when his opponent hits a down the line approach. BTW, he will need to practice loopy balls that are 4-6' over the net. Many of his young opponents will hit these to get him frustrated. He will need to be really patient and only step in to attack short balls with his flatter shot (yes 1-2' over the net).
Thanks for the valuable advise. He has a 2 hr session today and I will keep an eye and also try the setup you suggested to see how he plays.