Be careful who you get your tips from and more so, how you receive your them.

Let’s use two players with different skill levels – The 5.5  and 3.0.

Tip given – Snap your wrist for more power on the serve.

The 3.0 player tries this and ends up with wrist trouble (Carpel tunnel). More than likely, the 3.0 player is serving with a forehand grip.

The 5.5 player does the same and understands that the wrist snap we hear so much about is just the natural pro-nation of the forearm in relation with the palm  in an outward turning position. Not that complicated.

Consult the Pro who teaches the Pros.