so 1st, the CPU players have the same limitation rules about their number of accelerations than you.
To see detail of theses rules, have a look here :
The main thing to do long rally is to not waste acceleration when you can't hit a winner. Instead, it's better to use the lift.
And if you run out of acceleration, then you have 2 options left:
- run to volley
- use the short shot (button 1 + up), after a couple of lifted strikes (button 1 + down) (best against defenders, average against puncher, and not really efficient against varied and volleyers, except if they have a low form skill)
More tips here:
I hope it'll help.