KINGBARBOZA,
thanks to your Bug Reports, I found a couple of issues :
- the main one is that indeed the ball can end outside the aiming zone, even on strike prepared early enough ; it's a bad bug that will be fixed in the next update, or the one after (I already fixed it but it'll also require to rebalance the AI and possibly the gameplay too

)
- the 2nd one is that the more the acceleration is powerful, the more the precision lowers ; this loss might be a tad too strong, especially with a low Topspin skill (the player you had selected has only 20% in Topspin), as the margin over the net is smaller than with higher topspin skills ; I'll have to give some thoughts and test a lot to tune that, so it'll probably have to wait a few weeks

So the point at 5/4 is from both these 2 issues, and the 3 points in the Tie-break are about the 1st one only ; although, even with the fix, 2 of them might still end out, as the aiming zone was partly outside the court lines.