Auckland · R32 · Hard · 3 Jan 2023
Coco Gauff v Tatjana Maria
73–52 in points · Coco Gauff won
Why it went the way it did
Coco Gauff won 11.9 more points than Tatjana Maria relative to what the serve alone predicted. Tatjana Maria's biggest leaks: slice shot selection −10.5, net execution −1.9, backhand 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 | Coco Gauff | Tatjana Maria | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | ±0.0 | ±0.0 | −0.2 | −0.2 | +0.1 | ±0.0 | −0.8 | −0.7 |
| Serve 2nd | −0.1 | ±0.0 | +0.4 | +0.4 | +0.1 | ±0.0 | +0.7 | +0.8 |
| Return | −0.3 | +0.6 | +1.1 | +1.4 | −0.2 | −1.3 | −0.4 | −1.9 |
| Forehand | −0.4 | +2.7 | −0.2 | +2.1 | +0.1 | +1.5 | +2.5 | +4.1 |
| Backhand | +0.3 | +1.1 | −2.5 | −1.1 | −0.1 | +0.7 | −1.3 | −0.7 |
| Slice | ±0.0 | −1.6 | −0.5 | −2.1 | +0.2 | −10.5 | +0.5 | −9.8 |
| Net | ±0.0 | +0.2 | −0.2 | −0.1 | +0.3 | +0.7 | −1.9 | −1.0 |
| Touch | +0.1 | ±0.0 | +1.3 | +1.4 | −0.2 | −0.8 | +0.1 | −0.8 |
| All shots | −0.3 | +2.8 | −0.6 | +1.9 | +0.3 | −9.6 | −0.7 | −10.1 |
Set by set
| Set | Coco Gauff | Tatjana Maria | Net, Coco | |
|---|---|---|---|---|
| 1 | −2.3 | −7.6 | +5.3 | |
| 2 | +4.1 | −2.4 | +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.
Coco Gauff serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 46% 67% | 19% 60% | 35% 56% |
| 2 | 56% 87% | 26% 57% | 19% 40% |
Within sets +0.40 per 100 first serves, every two to three service games
Tatjana Maria serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 30% 69% | 11% 60% | 59% 35% |
| 2 | 29% 25% | 21% 50% | 50% 57% |
Set to set −1.45 per 100 first serves in sets 2+
Within sets +0.62 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.
Coco Gauff
8.7 points left on the table across 272 shots 3.21 per 100 shots
- Return of a 2nd serve, wide, deuce court hit FH through the middle ×6; FH inside-out rates higher · 0.68 pts
- Rally, shots 5–8: slice to your backhand side, you at net hit BH volley through the middle ×1; BH volley down the line rates higher · 0.30 pts
- Long rally, 9+: drive to your middle, you at net hit BH volley through the middle ×1; BH volley crosscourt rates higher · 0.28 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×5; FH crosscourt rates higher · 0.27 pts
Tatjana Maria
8.8 points left on the table across 247 shots 3.55 per 100 shots
- Rally, shots 5–8: drive to your backhand side hit BH slice through the middle ×13; BH slice crosscourt rates higher · 0.78 pts
- Serve +1: mid-depth return to your middle hit BH slice through the middle ×7; BH slice down the line rates higher · 0.32 pts
- Rally, shots 5–8: drive to your forehand side, you at net hit FH volley down the line ×2; FH volley crosscourt rates higher · 0.27 pts
- Rally, shots 5–8: drive to your forehand side, you at net hit FH volley through the middle ×1; FH volley crosscourt rates higher · 0.25 pts