The lab · AI tennis video analysis
Paris practice, 7 November. Every shot tracked from one fixed camera: speed, spin, placement, quality and the swing behind each one.
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Your recorded sessions, played back with shot analysis.
Playback · Paris practice
One point from the session, start to finish: a serve, ten more shots, and the ball that finally lands out. The ball track, bounce calls, shot labels and both players’ pose are drawn from the app’s own analysis of the video. Where the app is unsure of a speed, it shows none.
Under the hood · Paris practice
Speed and spin are measured from the ball. Placement comes from the bounce. Quality and mechanics come from the swing itself. Nothing here is a guess dressed as a score.
| Time | Speed | Spin | Call | Quality | Swing |
|---|---|---|---|---|---|
| 0:01 | 92 km/h | 2,091 rpm | IN | 80 | 66 |
| 0:02 | 106 km/h | 468 rpm | CLOSE | 69 | 42 |
| 0:06 | 106 km/h | 372 rpm | IN | 82 | 62 |
| 0:16 | 99 km/h | 339 rpm slice | IN | 79 | 76 |
The near player’s swings from the Paris practice, replayed from the 17 body points the app tracks, with the racket hand’s path.
Pick a swing
Ten component scores from the measured body positions, averaged across the four forehands.
How the hardest in-balls differed from the rest of the session, in standard deviations.
Copy the load, not the outcome: turn, coil, unwind, then drive up through contact.
Where the shots went · a full match
Four forehands make a practice. This is what a whole match looks like: each mark is where a ball actually landed, read off one phone behind the court. Filter it and the numbers follow.
From the player tracker: your feet, every few frames.
Over time · eight sessions
The same measures, session after session. Not a leaderboard against strangers: a line against your own last month.
Average per analysed session. Switch the metric to see what moved.
The loop
The point is not more data. The point is one thing to change in your tennis game before the next match.
Put it behind the baseline on a tripod. One phone, full court view.
No sensors, no wearables, no interruption to the game.
In/out, speed, spin, quality and mechanics, shot by shot.
Take one insight into the next match. Then measure again.
Pricing
Start free. Every plan includes shot placement, speed, spin and in/out calls.
£0forever
Record a session and see where every shot landed, how fast and with how much spin.
£9.99per month
No monthly limit on recording, and credits for league and tournament entries included.
£17.99per month
Everything in Basic, filmed sharper, with the mechanics of every contact.
One credit covers the entry fee for one league or tournament. The ladder itself is free to join.
Questions
Everything you need to know before you record your first tennis match.
Still curious? Get early accessOne phone, a tripod and a full view of the tennis court. No sensors, no wearables and no court hardware.
ContactFrame is built for match review and practice, not official line calling. We’ll publish accuracy figures when the feature launches.
Every tennis bounce and contact: in/out, ball speed, spin, shot quality, mechanics and a match report.
Yes. Tennis video analysis works anywhere in the world. The ladder is UK-only for now.
You do. Your recordings and analysis are yours, and you choose what to share.
Free covers 15 minutes of recording a month. Basic is £9.99 a month for unlimited recording, and Pro is £17.99 a month and adds shot mechanics. The ladder is free to join.
Yes. Play a UK tennis ladder match, record it, and review it afterwards. Explore the ladder.
The journal
In, out, speed, spin, quality, mechanics, and what the numbers don’t tell you.
ReadFilm a basket of serves and let the numbers tell you what to practise next.
ReadWhat separates a useful app from a slow-motion player with a logo.
ReadThe ladder · UK
The UK tennis ladder finds you a game at your level. The lab tells you what happened in it.
Early access
ContactFrame is coming to iOS and Android. Join the list for launch news and early access to tennis match analysis.
Tennis video analysis worldwide. The UK ladder is separate. No spam.
“The ladder finds the match. The lab tells you why you lost it.”
That’s the whole idea.
