Hi,
I know how to hit a short ball, and a short acceleration ball. However, the A.I. hits a very very short balls that bounce twice before I can reach it making it impossible for me to respond to it thus giving the A.I. a point and an advantage over me.
Imagine a drop shot, but very fast one with very low to non-existent bounce height off the ground.
So as you can see, it is an "Impossible" shot to respond to.