Roland Garros · R128 · Clay · 28 Sep 2020
Kaja Juvan v Angelique Kerber
67–45 in points · Kaja Juvan won
Why it went the way it did
Kaja Juvan won 11.5 more points than Angelique Kerber relative to what the serve alone predicted. Angelique Kerber's biggest leaks: forehand execution −2.2, slice shot selection −1.8, slice execution −1.3.
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 | Kaja Juvan | Angelique Kerber | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.3 | +0.1 | +0.5 | +0.9 | −0.1 | ±0.0 | −0.3 | −0.5 |
| Serve 2nd | −0.1 | ±0.0 | +1.4 | +1.3 | ±0.0 | ±0.0 | −1.2 | −1.2 |
| Return | −0.1 | +0.4 | +3.8 | +4.1 | +0.3 | +0.6 | +2.8 | +3.7 |
| Forehand | +0.6 | +1.9 | −0.6 | +1.9 | +0.7 | +1.6 | −2.2 | +0.1 |
| Backhand | −0.4 | ±0.0 | +2.8 | +2.5 | +0.1 | −0.6 | −0.7 | −1.2 |
| Slice | −0.2 | −4.0 | +1.2 | −3.0 | −0.1 | −1.8 | −1.3 | −3.3 |
| Net | ±0.0 | +0.1 | −0.5 | −0.3 | −0.1 | +0.5 | −0.3 | +0.1 |
| Touch | −0.1 | −1.3 | +2.2 | +0.9 | −0.1 | −0.1 | −0.9 | −1.0 |
| All shots | +0.1 | −2.7 | +10.9 | +8.2 | +0.7 | +0.2 | −4.2 | −3.2 |
Set by set
| Set | Kaja Juvan | Angelique Kerber | Net, Kaja | |
|---|---|---|---|---|
| 1 | +2.2 | −2.7 | +4.9 | |
| 2 | +6.0 | −0.6 | +6.6 |
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.
Kaja Juvan serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 46% 85% | 14% 75% | 39% 55% |
| 2 | 63% 33% | 4% 100% | 33% 88% |
Set to set +0.77 per 100 first serves in sets 2+
Within sets +0.40 per 100 first serves, every two to three service games
Angelique Kerber serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 49% 53% | 20% 57% | 31% 55% |
| 2 | 28% 14% | 36% 33% | 36% 33% |
Set to set +0.15 per 100 first serves in sets 2+
Within sets +0.66 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.
Kaja Juvan
6.3 points left on the table across 235 shots 2.69 per 100 shots
- Rally, shots 5–8: drive to your backhand side hit BH slice through the middle ×10; BH slice crosscourt rates higher · 0.60 pts
- Return of a 1st serve, wide, ad court hit BH through the middle ×9; BH crosscourt rates higher · 0.24 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×4; FH crosscourt rates higher · 0.22 pts
- Return of a 2nd serve, wide, ad court hit BH through the middle ×4; BH down the line rates higher · 0.21 pts
Angelique Kerber
6.5 points left on the table across 232 shots 2.80 per 100 shots
- Return of a 1st serve, T, deuce court hit FH through the middle ×5; FH inside-out rates higher · 1.08 pts
- Return of a 1st serve, T, deuce court hit FH crosscourt ×2; FH inside-out rates higher · 0.38 pts
- Return +1: drive to your backhand side hit BH through the middle ×6; BH crosscourt rates higher · 0.29 pts
- Rally, shots 5–8: lob to your middle, you at net hit Smash through the middle ×1; Smash crosscourt rates higher · 0.25 pts