Canada Masters · F · Hard · 28 Jul 1991
Petr Korda v Andrei Chesnokov
86–90 in points · Andrei Chesnokov won
Why it went the way it did
Andrei Chesnokov won 3.4 more points than Petr Korda relative to what the serve alone predicted. Petr Korda's biggest leaks: return execution −2.0, slice shot selection −1.8, serve 1st shot selection −1.7.
Each shot moves its hitter's chance of winning the point. Those moves are split into direction choice, shot selection and execution, and summed here. Read both columns together: one player's gain is the other's loss.
| Shot | Petr Korda | Andrei Chesnokov | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | −0.3 | −1.7 | −1.0 | −2.9 | −0.3 | −1.6 | −1.7 | −3.6 |
| Serve 2nd | ±0.0 | −0.7 | +0.3 | −0.4 | +0.2 | −0.8 | +2.0 | +1.5 |
| Return | +0.4 | −0.2 | −2.0 | −1.8 | −0.3 | +0.2 | +2.1 | +2.1 |
| Forehand | −0.4 | +2.3 | −0.3 | +1.6 | −1.8 | +1.0 | +0.8 | ±0.0 |
| Backhand | −0.3 | ±0.0 | −0.6 | −0.9 | −0.8 | −0.1 | ±0.0 | −0.9 |
| Slice | ±0.0 | −1.8 | +1.1 | −0.7 | −0.4 | −1.1 | +0.7 | −0.8 |
| Net | −0.1 | +0.5 | −0.3 | +0.1 | −0.1 | ±0.0 | +0.7 | +0.7 |
| Touch | ±0.0 | −0.2 | +0.4 | +0.3 | −0.2 | −0.5 | +0.6 | −0.1 |
| All shots | −0.6 | −1.8 | −2.3 | −4.7 | −3.7 | −2.8 | +5.2 | −1.3 |
Set by set
| Set | Petr Korda | Andrei Chesnokov | Net, Petr | |
|---|---|---|---|---|
| 1 | −0.9 | −2.6 | +1.7 | |
| 2 | −1.8 | +0.5 | −2.3 | |
| 3 | −2.0 | +0.8 | −2.8 |
Adaptation
First-serve direction mix set by set, with the share of points each direction won. The scores measure whether the server moved toward the directions that had been winning earlier in this match, set to set and every two to three service games, in points per 100 first serves. Read them as a habit, not a gain: across the tour, a direction's edge in early sets barely predicts the later ones. Whether the returner responded can't be told apart from noise within one match.
Petr Korda serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 59% 68% | 8% 33% | 32% 58% |
| 2 | 54% 47% | 21% 33% | 25% 57% |
| 3 | 46% 46% | 11% 33% | 43% 58% |
Set to set +1.18 per 100 first serves in sets 2+
Within sets −0.27 per 100 first serves, every two to three service games
Andrei Chesnokov serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 58% 50% | 25% 67% | 17% 50% |
| 2 | 73% 63% | 4% 0% | 23% 33% |
| 3 | 55% 44% | 15% 60% | 30% 90% |
Set to set +1.77 per 100 first serves in sets 2+
Within sets +0.73 per 100 first serves, every two to three service games
Counterfactual: the best direction every time
If each shot had gone in the direction that is usually worth most for that stroke and position, this is how many more points each player would expect to win. It's an upper bound: the best direction isn't always on, and the chart can't see the ball's pace or position.
Petr Korda
12.7 points left on the table across 391 shots 3.25 per 100 shots
- Serve +1: mid-depth return to your middle hit FH through the middle ×7; FH crosscourt rates higher · 0.60 pts
- Return of a 1st serve, wide, deuce court hit BH slice crosscourt ×7; BH slice inside-in rates higher · 0.47 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×9; FH crosscourt rates higher · 0.46 pts
- Return of a 2nd serve, wide, ad court hit FH through the middle ×5; FH inside-out rates higher · 0.43 pts
Andrei Chesnokov
12.1 points left on the table across 377 shots 3.20 per 100 shots
- Long rally, 9+: drive to your backhand side hit BH through the middle ×11; BH crosscourt rates higher · 0.46 pts
- Rally, shots 5–8: drive to your middle hit FH through the middle + approach ×2; FH down the line + approach rates higher · 0.44 pts
- Return of a 2nd serve, wide, ad court hit BH through the middle ×7; BH crosscourt rates higher · 0.39 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×7; FH crosscourt rates higher · 0.36 pts