Smash chain
Hip-shoulder separation 12° above cohort avg. Arm rush on 2 of 7 smashes — clip R2, R12 flagged.
Keep / refine
DeltaPlay
For coaches
Page 1 · Session KPIs
Karthik Sen · Coach Delta Report
Wed 11 Jun · Court 3 · 47 min singles vs Kavya Joshi · Coach Priya Sharma · U-17 · Session #14
Rallies
12
Illustrative
Coverage Measured
100%
Distance Measured
120.1 m
Peak movement Measured
17.4
km/h player speed
Fatigue drift
—
Illustrative
L–R court bias
70%
Measured left
Finisher
72
Gemini demo
Grinder
58
Gemini demo
Avg rally
8.2
Illustrative
Coach summary · GeminiAuto-generated · review before WhatsApp
Karthik opened with high-tempo net pressure (R1–3). Kavya adjusted with deep clears to his backhand corner — recovery lagged R6–8. Final third: improved split-step and cross-court recovery. Narrative illustrative · movement KPIs measured.
02
Page 2 · Spatial analysis
Court coverage & movement map
Heatmap · P1 Karthik Measured
6×4 zone grid · pose occupancy
Left-side bias matches 70% measured split · avg speed 7.4 km/h.
Movement trail · mini court Illustrative
Pose-tracked path · last 8 rallies
Repeated BH rear loops (terracotta) correlate with lost rallies R6–8.
Style radar
Six-axis player fingerprint
■ Today ■ 4-session avg
Session momentum
Movement intensity index · 5-min blocks
Dip at 20–25 min (fatigue) — align water break / drill change here.
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Page 3 · Rally log & shot mix
Rally-by-rally intelligence
Rally log12 rallies · singles
| # | Time | Shots | Winner | Ending | Notes |
|---|---|---|---|---|---|
| 1 | 02:14 | 6 | Karthik | Net kill | Fast approach · good split |
| 2 | 04:02 | 9 | Karthik | Smash winner | Clean load transfer |
| 3 | 06:18 | 5 | Karthik | Drop | Forehand net pressure |
| 4 | 09:44 | 11 | Kavya | Clear | BH rear slow reset |
| 5 | 12:30 | 8 | Kavya | Drive | Stuck mid-court |
| 6 | 15:02 | 14 | Kavya | Clear | Fatigue drift starts |
| 7 | 18:20 | 7 | Karthik | Net | Recovered aggression |
| 8 | 22:08 | 10 | Kavya | Clear | BH corner again |
| 9 | 28:14 | 6 | Karthik | Smash | Finisher mode |
| 10 | 33:40 | 12 | Karthik | Drive | Long rally win |
| 11 | 38:02 | 9 | Kavya | Drop | Late net approach |
| 12 | 42:18 | 8 | Karthik | Smash | Strong close |
Shot tendency · Karthik
Gemini event classification
Point endings
How rallies ended · both players
FINISHER
72
GRINDER
58
04
Page 4 · Biomechanics & action plan
Movement insights & next session
Lunge load
54/46 L–R on deep retrieves. BH lunge depth −6% vs FH — matches heatmap gap.
Drill: BH rear
Recovery
Split-step late in min 20–30 window. +12% recovery score vs May after coach cue at min 31.
Cue worked
Reach utilisation84%Wingspan used in stretch situations — room to extend on BH clears.
Net approach rate19Forward takes per session · target 22 for U-17 aggressive profile.
Centre recovery time1.4sAvg return-to-T after rear-court shot · benchmark 1.2s.
Recommended drills · next session
- Cross-court BH recovery — 3×5 min, feed deep BH, emphasise split-step before push-off
- Finisher finishers — long rally to smash-only winner (aligns with 72 finisher score)
- Fatigue checkpoint at min 20 — 90s water + shadow footwork before block 3
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