I am not sure about ur current player status, like skill level or experience with different game situations. The two tips above are right btw. Some basic tips would be:
- U can set several directions for the Serve, so I would recommend u to use left/right before the serve
- Avoid perma spamming A (Lob) or Down + S (Slice) against a front/back team
Do you know how to use Long Slice?
Down + S + Up, almost immediately together, try it in Singleplayer-mode, maybe ur keyboard doesn't support to press more than 2 keys at the same time but mostly it works after some training. -> Like a normal slice and then click Up, done.
Maybe it is too early but u can plan several tactics with Long Slice, like ur backpartner shots Long Slice to the net and opponent will smash it, now it is ur turn young french, re-smash the shot and u got an heavy chance to make the point.