A foul.
If you step on the white line in front of you while serving, it is illegal, its called faulting
a serve
An ace
It is called a service ace!
serve?
It is called a letThe server gets to reserve the serve that was a let
I am not sure but just call your local tennis place
I held by a guy called Aaron Savannah.
Almost all of your joints are used in tennis, but the main ones in a tennis serve are the knee joints, and elbow joints.
The legal serve where the opponent fails to touch the tennis ball is called 'ACE'.
It's illegal to serve a minor ANYWHERE
You can hit an underhand serve in tennis; however, the overhand serve is more effective because it is more powerful. That is why you don't see the underhand serve used much.