A four-state contact-height chart — one density ridge per wing on a shared centimetre axis, strike-zone tiers cut from the player's own height, the net cord marked, and the ideal-window share printed per wing.
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M. Okafor · Club singles · 6-4, 4-6, 7-5 · 1h 52m · 183 cm
Forehand
64%in the hip–shoulder window85 of 132 groundstrokes
Backhandstruck low
37%in the hip–shoulder window35 of 96 groundstrokes
Point at a zone — or focus the plot and use the arrow keys — for each wing's count in that strike zone.
Backhand: 25% of contacts below the knee (24 of 96), 57% below the net cord — the ball is being taken late, after the bounce has dropped.
Zones are cut from the player's own height — knee 0.285, hip 0.530, shoulder 0.818 of standing height — so 183 cm puts the ideal window at 97–150 cm. The dashed line is the net cord: 91.4 cm over the centre strap, rising to 107 cm at the posts, so anything struck under it has to be lifted. Ridge width is shots per 8 cm bin on one shared scale; every count, share and median on this card is taken from the heights themselves, never from the bins.
Contact height by wing: M. Okafor, Club singles · 6-4, 4-6, 7-5 · 1h 52m. 228 groundstrokes across 2 wings, plotted on a height axis from the court surface to 184 cm. Strike zones are cut from a 183 cm player: below knee under 52 cm, knee to hip 52 to 97 cm, hip to shoulder 97 to 150 cm, above shoulder from 150 cm. Forehand: 132 groundstrokes, 64% struck in the hip–shoulder window, median 110 cm, 23% below the 91.4 cm net cord. Backhand: 96 groundstrokes, 37% struck in the hip–shoulder window, median 85 cm, 57% below the 91.4 cm net cord. Backhand is being struck below the knee more than 20% of the time. Exact counts follow in the data table.
Every strike zone from above the shoulder down to below the knee, with each wing's contacts and its share of that wing's groundstrokes.
Strike zone
Range
Forehand contacts
Forehand share
Backhand contacts
Backhand share
Above shoulder
150 cm and up
9
7%
4
4%
Hip–shoulder (ideal)
97–150 cm
85
64%
35
37%
Knee–hip
52–97 cm
38
29%
33
34%
Below knee
under 52 cm
0
0%
24
25%
empty
Contact height by wing
M. Okafor · Club singles · 6-4, 4-6, 7-5 · 1h 52m · 183 cm
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Each wing gets a column here — the height of every strike stacked against the knee, hip and shoulder zones cut from the player's own height.
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Contact height by wing
M. Okafor · Club singles · 6-4, 4-6, 7-5 · 1h 52m · 183 cm
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Contact height by wing
M. Okafor · Club singles · 6-4, 4-6, 7-5 · 1h 52m · 183 cm
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