How to Beef up a Spin Serve
by: Dave Winship @ On The Line

If your serve has plenty of spin on it but lacks penetration, you're probably cutting right across the ball. This action imparts lots of slice, is generally pretty reliable but doesn't have any pace.

Try accelerating the racket on the outside of the ball and pronating your forearm so that your thumb points to the ground as you follow through.

Give your opponent the thumbs down if they start taking liberties with your spin serve!