Hi everyone! My 7 year old son played a practice set with an almost nine year old who kept hitting ( or I should say blasting ) balls to his feet. Usually he is capable of hitting nice rallies but in this case he wasn't able to do anything at all! The balls were low and literally at his feet. The parent of that boy commented to me that you need to learn to hit on the rise for those balls. I would greatly appreciate any tips that you might have to teach him this skill as well as any thoughts on how long it takes to master the skill at this age . Thanks in advance!