Rhythm and a consistent toss come first
Most tennis serve tips start with the arm. I start with the toss, because most serve problems that look like arm problems are toss problems. If the ball goes up somewhere different every time, your body spends the whole motion adjusting — leaning, reaching, rushing — and nothing can repeat. A good toss is boring: the same height and the same place, every serve. For most first serves that place is a little in front of you and toward your hitting side, far enough forward that the ball would land inside the baseline if you let it drop.
Lift the ball with a straight arm from the shoulder and release it around head height, with no flick of the wrist. Then connect the toss to the swing. A simple rhythm cue for developing players is "down together, up together": both arms drop together, both rise together, and the motion never stops and restarts at the top. Make one habit non-negotiable — if the toss is bad, catch it and start again. Twenty practice tosses a day, letting each ball drop to see where it lands, will do more for some serves than an hour of hitting, and it is one of the simplest tennis drills you can do at home.
Power starts in the legs, not the arm
A serve is a throw, and like any good throw it is built from the ground up. The knees bend and load, the legs drive up and into the court, the hips and trunk rotate, the hitting shoulder rises above the tossing shoulder, and the arm arrives last — fast and loose. Each link hands its speed to the next. Coaches call this the kinetic chain, and when a link is missing, the arm tries to make up the difference. That buys a little pace and, sooner or later, a sore shoulder or elbow.
A quick test: hit five serves with straight legs, then five with a full knee bend and drive. If the second five do not feel faster and easier on the arm, your legs are bending but not pushing — going down and up without driving into the ball. Leg drive, hip mobility and rotational strength can all be trained off court, and they are a large part of the physical qualities a tennis player needs.
The continental grip and a loose arm
Serve with a continental grip — the grip you would use to hammer a nail with the edge of the racquet. It lets the forearm rotate through contact, which is where both pace and spin come from. Players who serve with a forehand grip can push the ball in at lower levels, but they hit a ceiling: the strings face the target too early, spin is hard to produce, and the second serve becomes a nervous pat. Changing grips feels worse before it feels better. Expect a few awkward weeks, and do not go back.
The second ingredient is relaxation, because a tense arm is a slow arm. Hold the racquet lightly — if ten is the hardest you can squeeze, stay around three or four — so the racquet can drop behind your back and whip up to the ball. A good check: turn the racquet around so you are holding it near the head, and shadow your serve. The whoosh should be loudest through the contact zone, not at the start of the swing. Racquet-head speed comes from a loose arm at the end of a well-sequenced chain, never from muscling the ball.
Placement and spin before power
Every serve has three targets on each side: wide, body and T. A serve that hits its target at medium pace usually does more damage than a fast one into the middle of the box, because it moves or jams the returner and takes away their best swing. Spin is your margin. Topspin lets you clear the net with room to spare and still bring the ball down into the box; slice bends the ball sideways, pulling the returner wide or into the body. Learn both, and keep the motions looking as alike as you can — small toss adjustments, the same rhythm — so a good returner cannot read the serve off your toss.
The second serve is the real test
Anyone can hit a first serve when nothing is at stake. The second serve tells you whether you have a serve. Most double faults come from the same place: the player slows the arm down to make sure, the ball loses spin, and without spin there is nothing to bring it down into the box. The fix sounds backwards. Keep swinging fast, but change the swing path and the toss so the strings brush up the back of the ball — spin, not caution, is what keeps it in. Commit to one second serve you trust, usually a kick or a heavy slice, and hit it with full racquet speed.
It is also one of the clearest markers of level. Between two juniors with similar strokes, the one whose second serve holds up at 30–40 usually wins the close matches, and very few players become professional tennis players with a second serve they are afraid of. That trust is built in practice, long before the moment arrives.
How to practice your serve
Most players practice serving by emptying a basket at no particular target. Put targets down instead — cones, towels, empty ball cans — and serve in sets of ten to one target before moving on. Count the makes and write them down; a number you can improve beats a feeling. Then add pressure:
- Second serves only. Play practice sets with one serve per point — your second serve. Nothing builds trust in it faster.
- Double faults count double. In practice games, a double fault loses two points.
- Serve plus one. Serve to a target, then hit the next ball to a planned target. The serve exists to set up the first forehand, so practice them together.
- Finish under pressure. End every session with ten second serves in a row; a miss means you start the ten again.
Common faults, and how to see your own
| Fault | What you see | The fix |
|---|---|---|
| Inconsistent toss | Leaning, reaching or rushing to find the ball | Daily toss practice; catch every bad toss and start again |
| Arming the ball | Little knee bend or drive; a sore shoulder | Load and drive with the legs; let the arm arrive last |
| Forehand grip | Flat, low-spin serves and a pushed second serve | Continental grip, even through a few awkward weeks |
| Opening up early | The chest faces the net before contact | Stay sideways longer; keep the tossing arm up a beat longer |
| Pulling the head down | Serves into the net from a low contact point | Keep your eyes up on the contact point until the ball has gone |
| Slowing down on the second serve | Double faults under pressure | Full racquet speed with more spin, brushing up the ball |
You cannot fix what you cannot see, and your serve feels nothing like it looks. Film it from the side and from behind the baseline, using your phone's slow-motion setting. Check one thing per session — toss location, leg drive, whether the racquet drops behind you — and put your clip beside a model of the same moment. Treat your own footage like any tennis training videos: watch with a question, not for entertainment.
When you want to go further than one article can, that is what my free online tennis training is for: 250+ training videos, free to join with no credit card required, organized the way the game is actually taught — technique, tactics, movement and the mental side.
Watch on the court, in the car, or the night before a match, then test one change against a target — a serve only improves on court. Members can unlock the full premium library, courses and 1-on-1 sessions when they're ready. Start free: join Saviano Online, pick one fault from the table above, and fix that one first.