Best robot drills to improve fast for lower level player?

[FrenchFrog33]

What are the best robot drills to improve quickly?
I had a total knee replacement 7 months ago. I want to reach 1500+ USA level (over 200+ points than I am now)

Thanks!

 

[Dr Evil]

A robot can be helpful, though I'd strongly recommend using a video delay app for constant visual feedback; otherwise the robot will just be an efficient way to create bad habits. Work on basic shots and especially transitions, focusing on form, footwork, balance, and consistency. Post-knee-replacement, you'll want to figure out how much you can move safely and effectively.

 

[dingyibvs]

What are the best robot drills to improve quickly?
I had a total knee replacement 7 months ago. I want to reach 1500+ USA level (over 200+ points than I am now)

Thanks!

Loop backspins. If possible, add movement before the loop as well as randomness.

 

[FrenchFrog33]

Should practicing serves and service returns be the priority? 80% of practice???