Wimbledon · R32 · Grass · 7 Jul 2018
Naomi Osaka v Angelique Kerber
44–66 in points · Angelique Kerber won
Why it went the way it did
Angelique Kerber won 11.9 more points than Naomi Osaka relative to what the serve alone predicted. Naomi Osaka's biggest leaks: return execution −3.1.
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 | Naomi Osaka | Angelique Kerber | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.2 | ±0.0 | −0.5 | −0.3 | +0.3 | ±0.0 | −0.2 | ±0.0 |
| Serve 2nd | ±0.0 | ±0.0 | +1.0 | +1.1 | −0.1 | ±0.0 | +1.2 | +1.1 |
| Return | −0.3 | +0.5 | −3.1 | −2.9 | +0.1 | +1.5 | +2.7 | +4.3 |
| Forehand | +0.6 | +0.7 | +3.8 | +5.2 | +0.5 | +0.7 | +7.6 | +8.8 |
| Backhand | +0.4 | +1.6 | +0.2 | +2.3 | −0.2 | +0.7 | +4.0 | +4.5 |
| Slice | ±0.0 | −0.3 | −0.1 | −0.4 | +0.1 | −1.5 | +0.2 | −1.2 |
| Net | +0.2 | +0.3 | −0.1 | +0.4 | ±0.0 | ±0.0 | ±0.0 | ±0.0 |
| Touch | ±0.0 | ±0.0 | ±0.0 | ±0.0 | +0.1 | −0.6 | +0.2 | −0.3 |
| All shots | +1.1 | +2.9 | +1.3 | +5.3 | +0.8 | +0.7 | +15.7 | +17.2 |
Set by set
| Set | Naomi Osaka | Angelique Kerber | Net, Naomi | |
|---|---|---|---|---|
| 1 | +2.8 | +8.4 | −5.6 | |
| 2 | +2.5 | +8.8 | −6.3 |
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.
Naomi Osaka serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 46% 27% | 13% 67% | 42% 70% |
| 2 | 36% 77% | 14% 60% | 50% 39% |
Within sets +1.39 per 100 first serves, every two to three service games
Angelique Kerber serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 57% 62% | 13% 67% | 30% 100% |
| 2 | 52% 64% | 4% 100% | 44% 92% |
Within sets +1.74 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.
Naomi Osaka
3.8 points left on the table across 193 shots 1.97 per 100 shots
- Return of a 1st serve, wide, deuce court hit FH down the line ×4; FH crosscourt rates higher · 0.35 pts
- Return of a 1st serve, T, deuce court hit BH down the line ×3; BH through the middle rates higher · 0.26 pts
- Long rally, 9+: drive to your backhand side hit BH through the middle ×4; BH crosscourt rates higher · 0.21 pts
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×4; BH crosscourt rates higher · 0.17 pts
Angelique Kerber
4.2 points left on the table across 181 shots 2.34 per 100 shots
- Return of a 1st serve, T, ad court hit BH down the line ×3; BH through the middle rates higher · 0.42 pts
- Rally, shots 5–8: volley to your backhand side, opponent at net hit BH through the middle ×1; BH crosscourt rates higher · 0.23 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×4; FH crosscourt rates higher · 0.22 pts
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×5; BH crosscourt rates higher · 0.21 pts