Vikram's Web Archive

Instead of trying to hit the ball with correct tennis technique which may be :

grip like this

elbow bent

follow through above your shoulder

stay sideways

Try hitting the ball in a correct way:

drive through and keep the racquet pointing towards the target

move the racquet upwards

And tennis technique is just a consequence of you trying to do this in the most comfortable way which also gives you the most energy / power to hit.

via The Origin Of Forehand And Backhand Tennis Technique.