Now open to players

You’ve seen the whole match. Now see each player.

Send us your match video: full analysis follows each player on their own, with their skeleton, their knee and elbow angles and everyone else dimmed. The key-moments summary is free.

Send your match See a sample profile

Watch Whole match Sinner Carreño Busta

A Miami Open rally, both players tracked.
Video: Court Level Fans, CC BY.

Coming next: the coaching view. What to change, shot by shot.

01 // How it works

Three steps. The first one is free.

01Share your videoA link from Google Drive, Dropbox or YouTube, plus your email. A phone on a tripod or a fence works.You

02We send the key momentsA free key-moments summary for videos up to 5 minutes, usually within a day.Free

03Upgrade to full analysisYour tracked moves, stats, measured angles, a coaching point and a profile entry. See pricing.Full analysis

02 // What you get

Your game, not the whole court.

01Your moves, trackedA skeleton on you for the whole match, so you see how you moved, not just where the ball went.Tracking

02Key moments and highlightsEvery shot or touch on a timeline, and a highlights clip you can keep and share.Highlights

03Shot and move statsHow many shots you hit, when, and from where on the court.Stats

04Measured anglesJoint angles such as elbow and knee at the moment of contact, measured from your video.Angles

05One coaching pointOne clear thing to work on, tied to the moments in your video that show it.Coaching

06A profile that growsYour page on refereeai.xyz. Every match you send adds to it, so you can see progress over time.Profile

03 // Sample report

One rally, one player.

Built from a public Miami Open rally filmed by a fan in the stands (CC BY), focused on Jannik Sinner. Every number below comes from our analysis of that clip. Sample

7 of 11shots in the rally hit by Sinner

24.6 srally length

98.4%of frames with his skeleton tracked

92–178°elbow angle at contact

Key moments

0:00Opens the rally from the baseline.
0:01.7Shot, elbow 147° at contact.
0:04.4Shot, arm near straight: 178°.
0:11.9Shot, elbow bent to 96°.
0:17.4Shot, the most bent contact: 92°.
0:21.5Comes forward to the net, 166° at contact.
0:23.2Last shot of the rally, at the net: 153°.

Elbow angle at contact, shot by shot

0:01.7147°

0:04.4178°

0:11.996°

0:17.492°

0:21.5166°

0:23.2153°

Coaching point

Same rally, very different arms: 92° at 0:17 against 178° at 0:04. Put those two contacts side by side and pick the one you want to repeat.

Open the sample profile →

04 // Send your match

Your key moments, free.

Paste a link to your video and leave your email. We send your key-moments summary, usually within a day. Free for videos up to 5 minutes; full analysis is $1 per minute of video. See pricing.

Only send videos you have the right to share. Players under 18 need a parent or guardian's OK.