|I totally pick these spots|
Coach is at service line feeding balls to player across net at baseline. Coach feeds 10 balls per player. Player sees how many he/she can hit cross court and in play. Player getting best percentage of 10 wins.
Repeat going down the line
Repeat from the backhand side.
Have two players involved, one taking the place of the coach and bounce feeding to baseline player. This way coach can stay on baseline side to assist with stroke analysis.