Why It Is Not Working: From Symptom to Cause in Tennis
Ball in the net, second serve gone, always late to the ball: the diagnostic grid that traces your symptom back to racket face, contact point, footwork or tension.
Sport: Tennis · Level: Beginner
Introduction
**In tennis the mistake almost always tells you what is wrong — you just have to stop asking why and start asking where and when.** Where does the ball land? Where in the movement does it break down? At which score does it happen? This guide flips the usual order: you are not looking for the right chapter, you are looking for your symptom.
The difference from "The Most Common Beginner Mistakes": that guide says what typically goes wrong. This one says which of your possible mistakes it is right now — because almost every tennis symptom has three or four plausible causes, and correcting the wrong one costs you a season.
A ball that goes into the net can be racket face, a late contact point, the wrong distance — or simply tension on the important point. Four causes, four completely different fixes.
What You Need
A practice partner who only counts instead of giving tips. Numbers beat opinions.
A phone video from behind, not from the side: only from behind do you see spacing and net clearance.
The score of your mistakes: 0-0, 30-30 or break point?
Your grip size — the one piece of gear data that genuinely changes something [6].
The patience for one change per week.
Step by Step
1. Red Flags First, Everything Else Second
Elbow or shoulder pain that lingers after play, a back that stabs on the serve: not a training topic.
2. Note the Place of the Error, Not the Feeling
Net cord, middle of the net, long out or wide out? These four error patterns lead to four different causes.
3. Note the Score
Does it happen evenly across the set, or does it cluster at 30-30 and break points? If it clusters on the big points, it is never technique.
4. Check Gear Before Technique
Grip size first: an individually fitted grip size halved the rate of lateral elbow complaints in a systematic review [6]. Five minutes of checking saves you months of technique work at the wrong end.
5. Only Then Change One Thing — for Two Weeks
And keep the load jumps small: a spike in weekly load was the strongest external predictor of injury [6].
Common Mistakes
"My forehand keeps landing in the net."How to tell them apart: look at where in the net. If the ball clips the net cord, you are only a few centimetres short on target height — you are aiming too low, which is not a technique question. If it lands well in front of the net, you hit it late: footwork and spacing. If it only happens on high or fast balls, it is timing. And if it only happens on the first ball after the return, you simply were not in position yet. Fix: for one session only count how many net errors clip the cord and how many drop in front of it — the ratio tells you whether to work on target height or on footwork. Go deeper in "The Forehand: Technique and Contact Point".
"My second serve keeps landing in the net."How to tell them apart: the giveaway is the toss, and you read it from where you have to move. If you fall forwards after the ball, the toss was too far in front. If you have to shrink or reach again, it was too low. Second test: if the first serve goes in and only the second finds the net, your technique is fine — you are slowing down on the second instead of adding spin. If it clusters at 30-30 and break points, it is tension. Fix: squeeze briefly with your left hand before every second serve — exactly that kept accuracy stable under competitive pressure in right-handers while the control group dropped clearly [5]. Continue in "Second Serve: Kick and Slice".
"My serve is slow no matter how hard I hit."How to tell them apart: ask what hurts after twenty serves. If it pulls at the front of the shoulder, you are pushing the ball instead of whipping it — palm facing up, and precisely this technique counts among the load factors on the hitting arm [1]. If nothing hurts and it is still slow, the drive from below is missing: legs, hip and trunk rotation deliver most of the racket speed [2]. As a reference for the trophy position: around 64 degrees of flexion in the front knee [9] — not a hint of a bend, close to a half squat. Fix: not more core work. Isolated core training showed no reliable effect on serve speed in the meta-analysis, combined training clearly more [3]. Go deeper in "Serving for Beginners".
"I am always late to the ball even though I do run."How to tell them apart: freeze the video at the exact moment your opponent strikes the ball — what your body is doing right there is the whole diagnosis. Still on your way back from the last ball? Recovery discipline is missing, not speed. Standing flat and still? The split step is missing: you hop before or after contact instead of during it. Already airborne and still late? You wait for the ball instead of the racket face. Being late only in the third set is fatigue instead: after a fatigue protocol change-of-direction time dropped from 11.75 to 12.99 seconds and serve accuracy fell by a third [8]. Fix: train starts, not laps — a point contains only about 1.6 changes of direction [4]. Continue in "Footwork Fundamentals" and "Footwork: The Spanish School".
"On the big points I lose myself."How to tell them apart: watch the video for what changes physically just before the error. If your swing gets shorter, you are braking — that is tightening up. If it gets longer and harder, you are trying to force the point — that is impatience, and it needs a different correction. Second test: does it happen on your own serve or on the return? Only on your own serve means a missing routine, not weak nerves [5]. Fix: first find out whether you brake or press — only then build the routine. Go deeper in "Mental Routines and Handling Pressure" and "The 90-Second RESET Routine".
"I lose to people who look worse than me."How to tell them apart: have two numbers counted across one set — your own errors and your opponent's winners. If your errors clearly dominate, he is not winning, you are losing: that is shot selection, not ability. If his winners dominate, he is either genuinely stronger or you are feeding the ball exactly where he wants it. Second test: does your error come inside the first four shots or later? Later means missing patience, earlier means missing construction. Fix: for one set only count, do not correct. Go deeper in "Tactics for Beginners: Safety First" and "Percentage Tennis and Match Tactics".
"The outside of my elbow burns after playing."How to tell them apart: the timing separates gear from technique. If it mainly shows up after playing and when gripping things in everyday life, it is the classic overload picture at the extensor origin. If it hurts during one particular shot — usually the backhand — the track leads to timing and contact point. Fix: before you rebuild your technique, have your grip size checked: an individually fitted grip size halved the rate of lateral elbow complaints [6]. Continue in "Choosing the Right Grips".
Safety Notes
These symptoms do not belong in the grid, they belong to a medical check:
Elbow pain that stays for more than a few weeks or gets in the way of gripping in everyday life.
Shoulder pain after serving that wakes you at night or limits lifting the arm.
Back pain that stabs during the serve or radiates into the leg.
A pop or stab in the calf after a sprint start.
Swelling, or a joint that gives way under load.
This guide sorts training problems, it makes no diagnosis and suggests no treatment.
The most effective prevention is unspectacular: avoid load spikes. A sudden rise in weekly load was the strongest external predictor of injury in tennis [6], and in a year-long cohort every such spike measurably raised the risk of back pain [7]. Going from two to five sessions a week does not injure you because of your technique.
Pro Tip
The most expensive thinking error in tennis troubleshooting is diagnosing the feeling instead of the ball.
"My forehand feels weird" is not a diagnosis. "Seven out of ten errors go into the middle of the net, all on balls above hip height" is one. The ball does not lie, your feeling does — especially after a lost set.
Take a notepad onto the court and for one week write down only two things: where the error lands and at what score. You will be surprised how often the pattern says something completely different from your gut.
FAQ
Why does my second serve always land in the net?
Check three things in this order. First the toss: if you fall forwards, it was too far in front. Second the comparison with your first serve — if that one goes in, you are slowing down on the second instead of adding spin. Third the score: if it clusters at 30-30, it is tension, not technique [5].
Why is my serve so slow?
Usually the drive from below is missing. Footwork plus hip and trunk rotation deliver most of the racket speed [2] — as a reference, players bend the front knee around 64 degrees in the trophy position [9], close to a half squat. And isolated core training on its own will not make you faster [3].
Why am I always late to the ball?
Because you are probably training the wrong thing. A point contains about 1.6 changes of direction with only 4.8 metres in between [4] — two or three steps, brake, go again. Running laps instead of practising first steps will not get you to the ball sooner. Being late only in the third set is fatigue instead [8].
Why do I tighten up on the big points?
First check whether your swing gets shorter or longer — braking and forcing need different corrections. If it only happens on your own serve, a routine is missing: a short deliberate squeeze with the left hand before serving kept accuracy stable under pressure in right-handers [5].
Key Takeaways
The place of the error is the diagnosis: net cord means target height, middle of the net means hitting late, long out means leaning back.
If your errors cluster at 30-30 and break points instead of spreading across the set, it is never technique but routine and tension [5].
Tennis is a stop-start sport: about 1.6 changes of direction per point with only 4.8 metres in between [4] — train first steps, not laps.