Australian Open Juniors · F · Hard · 28 Jan 2023
Alina Korneeva v Mirra Andreeva
139–138 in points · Alina Korneeva won
Why it went the way it did
Alina Korneeva won 1.2 more points than Mirra Andreeva relative to what the serve alone predicted. Mirra Andreeva's biggest leaks: slice shot selection −8.3, touch shot selection −7.4, serve 2nd execution −2.3.
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 | Alina Korneeva | Mirra Andreeva | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | −1.1 | ±0.0 | +1.9 | +0.8 | −1.8 | ±0.0 | −0.5 | −2.3 |
| Serve 2nd | −0.1 | ±0.0 | +0.2 | ±0.0 | ±0.0 | ±0.0 | −2.3 | −2.4 |
| Return | +0.1 | +0.4 | +3.6 | +4.1 | −0.2 | +1.4 | +7.7 | +8.9 |
| Forehand | +1.8 | +6.6 | +10.3 | +18.7 | +1.7 | +5.3 | +10.5 | +17.5 |
| Backhand | −0.3 | +1.2 | +5.3 | +6.2 | −0.3 | +4.0 | +5.1 | +8.8 |
| Slice | −0.2 | −4.9 | +1.5 | −3.6 | −0.3 | −8.3 | +4.4 | −4.2 |
| Net | +0.3 | +1.2 | −2.4 | −0.9 | −0.1 | +0.7 | −0.6 | ±0.0 |
| Touch | ±0.0 | −3.6 | −1.0 | −4.6 | +1.3 | −7.4 | −0.7 | −6.8 |
| All shots | +0.4 | +0.8 | +19.4 | +20.6 | +0.3 | −4.3 | +23.5 | +19.5 |
Set by set
| Set | Alina Korneeva | Mirra Andreeva | Net, Alina | |
|---|---|---|---|---|
| 1 | +8.3 | +10.2 | −1.8 | |
| 2 | +10.5 | +9.3 | +1.2 | |
| 3 | +1.8 | ±0.0 | +1.8 |
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.
Alina Korneeva serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 46% 58% | 39% 50% | 15% 33% |
| 2 | 41% 50% | 36% 56% | 23% 60% |
| 3 | 41% 55% | 43% 62% | 16% 13% |
Set to set −0.46 per 100 first serves in sets 2+
Within sets −0.44 per 100 first serves, every two to three service games
Mirra Andreeva serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 28% 43% | 54% 67% | 18% 44% |
| 2 | 23% 50% | 49% 54% | 28% 53% |
| 3 | 28% 36% | 35% 57% | 38% 40% |
Set to set −1.08 per 100 first serves in sets 2+
Within sets −0.76 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.
Alina Korneeva
21.8 points left on the table across 968 shots 2.25 per 100 shots
- Long rally, 9+: drive to your backhand side hit BH through the middle ×25; BH crosscourt rates higher · 1.31 pts
- Long rally, 9+: drive to your forehand side hit FH through the middle ×22; FH crosscourt rates higher · 1.21 pts
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×19; BH crosscourt rates higher · 0.82 pts
- Rally, shots 5–8: drive to your middle hit BH through the middle ×14; BH crosscourt rates higher · 0.66 pts
Mirra Andreeva
21.6 points left on the table across 971 shots 2.22 per 100 shots
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×33; BH crosscourt rates higher · 1.42 pts
- Long rally, 9+: drive to your backhand side hit BH through the middle ×23; BH crosscourt rates higher · 1.20 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×21; FH crosscourt rates higher · 1.14 pts
- Rally, shots 5–8: drive to your middle hit FH through the middle ×11; FH crosscourt rates higher · 0.77 pts