Originally Posted by Rina
Teach him to run. He is 11, plenty of time to learn, unless you mean he is really lazy and has low muscle tone.
Yes, make him run "suicide", run sprints, run 400M, miles, run and run and run...
Make hit balls from corner to corner for 100 balls..
. Make him hit a deep ball, then run down a drop shot...
Also teaching him anticipation...
He will need good speed to play doubles as well, unless he will only play against 2.5 players or super seniors.