how to add an extra 10 mph on to your serve

[serveit]

the secret to adding some extra zip on your serve is simple but quite hard to master

Always have your right shoulder lower then your left one this can be achived by using your hip by bending your hip out this automaticly makes your right should lower than your left one givng you extra power

[Kobble]

You mean on the wind up, right?

[x Southpaw x]

secret? -looks around for responses-

[Rickson]

You mean on the wind up, right?
If he means at contact, you'd better subtract 40 mph.

[serveit]

not at contact obisuly
on the wind up

[Lleyton Hewitt]

I am told that to add some more speed to ur serve, think that ur serve and volleying which gives u just the extra push when serving