Auckland · R32 · Hard · 5 Jan 2015
Daniela Hantuchova v Sara Errani
64–45 in points · Daniela Hantuchova won
Why it went the way it did
Daniela Hantuchova won 9.3 more points than Sara Errani relative to what the serve alone predicted. Sara Errani's biggest leaks: serve 1st direction choices −1.1, slice shot selection −1.1, touch shot selection −0.7.
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 | Daniela Hantuchova | Sara Errani | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | ±0.0 | ±0.0 | +1.4 | +1.4 | −1.1 | ±0.0 | +0.3 | −0.8 |
| Serve 2nd | ±0.0 | ±0.0 | −1.0 | −1.0 | ±0.0 | ±0.0 | +0.3 | +0.3 |
| Return | +0.1 | +0.7 | +2.1 | +2.9 | −0.4 | −0.5 | +2.0 | +1.2 |
| Forehand | +0.3 | +1.1 | +0.9 | +2.3 | −0.1 | +0.4 | +2.4 | +2.7 |
| Backhand | ±0.0 | +0.1 | +4.9 | +5.0 | −0.5 | +0.8 | +2.5 | +2.7 |
| Slice | −0.1 | −0.7 | −0.1 | −0.9 | −0.3 | −1.1 | −0.6 | −1.9 |
| Net | +0.1 | +0.4 | +2.9 | +3.4 | ±0.0 | +0.1 | +0.2 | +0.4 |
| Touch | ±0.0 | ±0.0 | ±0.0 | ±0.0 | −0.1 | −0.7 | ±0.0 | −0.8 |
| All shots | +0.4 | +1.6 | +11.0 | +13.0 | −2.5 | −1.0 | +7.1 | +3.7 |
Set by set
| Set | Daniela Hantuchova | Sara Errani | Net, Daniela | |
|---|---|---|---|---|
| 1 | +8.0 | +4.8 | +3.2 | |
| 2 | +5.0 | −1.1 | +6.1 |
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.
Daniela Hantuchova serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 33% 58% | 19% 86% | 47% 65% |
| 2 | 35% 71% | 15% 33% | 50% 80% |
Set to set +1.96 per 100 first serves in sets 2+
Within sets +0.16 per 100 first serves, every two to three service games
Sara Errani serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 23% 57% | 74% 61% | 3% 0% |
| 2 | 27% 33% | 59% 38% | 14% 67% |
Set to set −1.87 per 100 first serves in sets 2+
Within sets −1.52 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.
Daniela Hantuchova
4.9 points left on the table across 214 shots 2.28 per 100 shots
- Rally, shots 5–8: volley to your forehand side, opponent at net hit FH through the middle ×1; FH down the line rates higher · 0.21 pts
- Rally, shots 5–8: drive to your middle hit FH through the middle ×3; FH crosscourt rates higher · 0.21 pts
- Rally, shots 5–8: drive to your forehand side, opponent at net, you at net hit FH volley down the line ×1; FH volley crosscourt rates higher · 0.20 pts
- Return of a 1st serve, wide, deuce court hit FH down the line ×3; FH crosscourt rates higher · 0.20 pts
Sara Errani
6.0 points left on the table across 192 shots 3.12 per 100 shots
- Return +1: drive to your backhand side hit BH through the middle ×9; BH crosscourt rates higher · 0.43 pts
- Serve +1: mid-depth return to your middle hit BH through the middle ×5; BH crosscourt rates higher · 0.31 pts
- Long rally, 9+: drive to your middle hit FH through the middle ×4; FH down the line rates higher · 0.28 pts
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×6; BH crosscourt rates higher · 0.26 pts