Tennis
A serve (sometimes called a service) is a shot to start a point. The serve is usually started by tossing the ball into the air and hitting it across the net. The serve may be done underhand or overhead. The overhead serve the most common form. The serve is done from behind the baseline (the line at the back of the court).  The serve must land on the inside of the service line and center service line on the other side of the net to call it good.  The serve that is set has to be in the box diagonal to where the server serves.