You will have to vary your serve and keep your opponent guessing at every service.
However, do not try to serve an ace with every service you send down.
Also, do not fall into a pattern with your service, e.
g.
first serve is always towards the outside line and second serve straight down the middle.
Keep your serve accurate, reliable and varied enough to win you points off it.
In executing your tennis service, remember that a tall person has an advantage over a short one due to his added reach upon delivery of service.
Use this to your advantage if you are the taller person.
Hit the tennis ball at the highest point you can comfortably reach, without unnecessary strain.
Make sure that you are in control of the service upon delivering it, otherwise you might be unable to reach the return delivery.
Do not try to hit balls that go beyond your reach as this will only cause you discomfort and possible injury.
Take your time to get your rhythm just right, throwing the ball up in the air directly above your playing side.
Hitting your tennis serve: With both feet firmly on the ground behind the baseline, drop your weight back on your right foot (right-handed player) and swing the racquet freely and easily behind your back.
Tossing the ball high enough into the air, start to slowly shift your weight forward, while at the same time increasing the power of your swing forward as the racquet starts its upward flight towards the ball.
Throw your weight forward upon contact between ball and racquet face, with the full power of the swing smashed into the service.
Keep your wrist a little flexible during service otherwise you might get hurt.
The rest of the racquet swing and wrist action depends on the type of delivery you want to send down.
Tennis Lessons offers more tips on how to improve your tennis game.