An inconsistent serve is maddening because it feels random — great one game, unhittable the next, no clear reason why. But serves are almost never randomly inconsistent. There's usually one thing going wrong upstream that knocks everything after it out of place, differently each time. The skill isn't fixing all the symptoms. It's finding the first domino.
Read the chain, not the symptom
The serve is a chain: toss, trophy, drop, drive, contact, finish. Each link hands off to the next, which means a wobble in an early link forces every later link to improvise a correction — and improvised corrections are, by definition, inconsistent. Chase the symptom you feel (the netted ball, the shanked contact) and you're treating the last domino to fall. Find the first one and the rest often stand back up on their own.
Nine times out of ten, the first domino is the toss. A toss that lands in a slightly different spot every serve forces your swing to adjust every serve, and a swing that adjusts can't repeat. Before you rebuild anything downstream, ask whether your toss is repeatable — because a wandering toss will make even a perfect swing look streaky.
The other classic first dominoes: a serve so rushed the trophy never happens the same way twice, and a racquet drop that shows up on some serves and not others. But the toss is the usual suspect, and it's the cheapest to fix.
What the camera reads
CoachVision measures how alike your serves are, hit to hit — a serve-to-serve consistency score, higher meaning more repeatable. It's the direct read on the very thing you're frustrated by: not "was that one good," but "do these look like the same serve." It needs two or more serves in a clip to compare, so film a few in a row when you want this read.
Then use the other measurements to find which link is wobbling. Is the toss-arm reach landing at a different height each serve? Is the trophy shape holding, or collapsing on the streaky ones? Is the drop there sometimes and gone others? The consistency score tells you that you're inconsistent; the per-serve readings help you find where. That's how you locate the first domino instead of guessing.
The fix — start at the toss
Since the toss is the usual culprit and the easiest to groove, start there. Lay a racquet flat on the ground at about one o'clock, just inside where you stand, and toss so the ball drops onto the strings — no swing, straight arm, fingertip release. Twenty tosses, fifteen-plus on target. A repeatable toss removes the biggest source of serve-to-serve variation there is, and it does it before you touch the swing.
Film a few serves in a row, side-on, and watch the serve-to-serve score climb as the toss steadies. When your serves finally start looking like copies of each other, the "why is this so random" feeling fades — because it was never random. It was one domino, and now it's standing back up.