This is an article written by Australian Tennis Great Ken Rosewall in his book "On Tennis."
In the smash, the swing itself can be said to be the same as for the service, but because you have to return a variety of different shots hit by your opponent, it is difficult.
One thing that is necessary in order to master the smash is to remember to always first turn yourself sideways to the net when you find yourself faced with a lob.
To do this, pull your left foot back, and while holding your racket in front of you and supporting it with your left hand, correctly judge the height of the lob. Move yourself quickly to the spot below where it is coming down.
Unlike when serving, where, at one point, you lower your racket and then move it over your shoulder, for the smash moment, it is better to take your racket as it is from in front of your chest to behind your shoulder. The overall feeling is the same as for the performance of the service.
After impact, swing your racket down in front of your body with same power as at impact, without changing at all from the moment when you hit the ball. Since you hit the ball with a flat racket, the surface should stay facing the same way.
For the finish, swing your racket down naturally to the left side of your body, in the same way as for the service.
Hope this helps with your game. Have fun!!!
