A four-state shot scatter — every tracked shot plotted at its own speed and spin, coloured by stroke, split into four playing-style quadrants by the player's own medians, with a legend that toggles a stroke in or out.
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R. Delgado · Set 1 · 4–6 · 16/26 first serves in (62%) · 2 double faults
Median split · 100 km/h · 2,070 rpm · 161 of 161 shots shown
Point at a dot to read one shot.
Strokenmed km/hmed rpm
in playwinnererrorstroke median
One dot is one tracked shot at its measured pair — nothing is binned, jittered or averaged, so which side of the crosshair a dot sits on is its true side. Spin is a rate, not a direction: slice and volley carry underspin, which is why a floated slice reads high on the spin axis and slow on the speed axis. The crosshair follows the shots still shown, so hiding a stroke re-centres it; the axes never move.
Shot speed vs spin: 161 tracked shots for R. Delgado, Set 1 · 4–6 · 16/26 first serves in (62%) · 2 double faults. Speed runs 61 to 162 km/h across, spin 540 to 3,430 rpm up. Crosshair at the median of the 161 shots shown: 100 km/h and 2,070 rpm. Floated slice 41, Heavy topspin 40, Blocked 39, Flat drive 41. Per-stroke medians and quadrant counts follow in the data tables.
Every stroke in the payload with its own medians and outcomes, out of 161 tracked shots. These numbers are taken over all tracked shots of that stroke, so they do not move when a stroke is hidden.
Stroke
shots
Median speed (km/h)
Median spin (rpm)
Winners
Errors
Shown
Forehand
54
108
2,130
4
12
shown
Backhand
41
98
1,930
1
10
shown
Serve
26
135.5
1,910
3
2
shown
Slice
24
79.5
2,515
0
4
shown
Volley
16
86.5
925
1
1
shown
Playing-style quadrants against the median crosshair, counted over the 161 shots currently shown.
Quadrant
Reading
shots
Floated slice
below the median speed, at or above the median spin
41
Heavy topspin
at or above the median speed and the median spin
40
Blocked
below the median speed and below the median spin
39
Flat drive
at or above the median speed, below the median spin
41
empty
Shot speed vs spin
R. Delgado · Set 1 · warm-up, nothing tracked yet
No shots tracked yet
Every tracked shot lands here as one dot — speed across, spin up — split against this player's own median.
Zyeon UI