Some serve faults happen at contact. This one is already decided a full beat earlier, at the trophy — which is what makes it worth catching. When your hitting elbow droops below your shoulder line as you load, the serve is quietly doomed before the racquet ever moves toward the ball. Fix the elbow here and a whole chain of downstream problems never gets the chance to start.
Why a low elbow poisons the serve
Picture the trophy: racquet cocked up behind your hitting shoulder, elbow leading. For the racquet head to fall behind your back — the drop that loads the throw — your elbow needs to be up around shoulder height, giving the head room to swing down. Let the elbow sag below the shoulder line and there's no room for that fall. The racquet can only go one way: forward and up, strings to the sky. That's the waiter's tray, and the drooped elbow is where it's born.
So a low elbow isn't a small cosmetic thing. It's the first domino. Behind almost every "my racquet won't drop" serve is an elbow that never got up to the shoulder line to begin with.
What the camera reads
CoachVision measures where your hitting elbow sits against your shoulder line at the trophy, in torso-lengths, with level as the checkpoint. Around the line is what you want. A clearly negative number — the elbow well below the line — is the app flagging the droop that sets up the tray. It reads from a side or behind clip, and it pairs naturally with the racquet-drop fold: when the elbow droops and the drop reads flat together, you're looking at one fault, not two. Coach the elbow height and the drop tends to arrive on its own.
The feel — elbow up, then everything else
The cue: get the elbow up to shoulder height first, and keep it there as you cock. Think of your upper arm as forming a line roughly level with your shoulders at the trophy, with the forearm and racquet angled up and back from that. If the elbow wants to sag, you may be rushing the wind-up or carrying tension in the shoulder — slow the load down and let the elbow ride up to the line before the toss peaks.
The drill — Trophy Pose Holds
Build the position and hold it where you can see it. In a mirror, set the trophy: toss arm up, racquet arm cocked, and — the whole point here — the hitting elbow up at shoulder height. Hold three seconds. Watch the elbow specifically: the moment it starts to sag is the moment to reset.
Ten holds daily. Three seconds each, elbow parked on the shoulder line. You're teaching your body that the elbow lives up there, not down by your ribs.
Then film a serve and watch the elbow-height number climb toward level. When the elbow holds the line at the trophy, the racquet finally has room to fall — and the tray you've been fighting at contact quietly disappears, because you fixed it a beat upstream where it actually lived.