Make life easy for yourself and hit the ball on the rise. One of the challenges with tennis is that every ball we hit will come to us differently. Different height, speed, spin, distance from our body etc. Our challenge it to try and move ourselves into position to execute as close to the same shat as possible each time.
Let me give you a tip that will make a massive difference to your groundstrokes. Hit every ball on the rise OR at the top of the bounce.
As soon as that ball starts to drop your whole stroke needs to change to get the ball up and over the net. The stroke becomes much more difficult and you will hit the frame of your racquet more especially if you are trying to apply topspin.
The first picture shows how closed the racquet face can be if you hit the ball on the rise. The key is that you can hit the ball very hard and it will stay in the court. You are changing the direction of the ball. In the picture the ball changes direction by about 90 degrees. Lets see what happens with a dropping ball.
With a dropping ball you need to open the face of the racquet, and hit up to get exactly same ball direction. However in this case the harder you hit the ball the further over the fence the ball will go. In which case most people then back off the power and they let gravity bring the ball down onto the court.
Now you can picture in your minds 2 different pictures. High level players strike across a rising ball and other players tap a dropping ball back up and over the net.
High level players use mainly the wind resistance of a heavily spinning ball to make it land in the court, while other players rely on gravity for it to land in the court.
To see another compact explanation of this look at or think of people playing ping pong. The ball is hit with a closed bat, as the ball is coming off the table. They can generate massive power and still keep it in that little area.
Anyway I hope that has got you thinking. Move those feet, move forward, hit the ball on the rise and WATCH YOUR GAME IMPROVE !!.
Enjoy your tennis !