Dubai · R16 · Hard · 16 Feb 2022
Dayana Yastremska v Barbora Krejcikova
72–62 in points · Dayana Yastremska won
Why it went the way it did
Dayana Yastremska won 4.0 more points than Barbora Krejcikova relative to what the serve alone predicted. Barbora Krejcikova's biggest leaks: return execution −5.5, forehand execution −1.9, slice shot selection −1.7.
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 | Dayana Yastremska | Barbora Krejcikova | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.2 | ±0.0 | +1.0 | +1.2 | +0.3 | ±0.0 | +1.3 | +1.6 |
| Serve 2nd | ±0.0 | ±0.0 | +0.3 | +0.4 | ±0.0 | ±0.0 | −1.2 | −1.1 |
| Return | −0.4 | +0.1 | −5.3 | −5.6 | +0.3 | +0.5 | −5.5 | −4.7 |
| Forehand | +0.2 | +0.3 | −1.1 | −0.6 | ±0.0 | +0.4 | −1.9 | −1.6 |
| Backhand | −0.3 | +0.2 | +0.3 | +0.2 | ±0.0 | +0.6 | −0.8 | −0.2 |
| Slice | −0.1 | −0.8 | +0.6 | −0.4 | ±0.0 | −1.7 | −0.4 | −2.1 |
| Net | +0.1 | +0.2 | +0.2 | +0.5 | −0.3 | +0.2 | −0.1 | −0.2 |
| Touch | ±0.0 | ±0.0 | −0.2 | −0.2 | ±0.0 | −0.2 | +0.1 | −0.1 |
| All shots | −0.3 | ±0.0 | −4.2 | −4.5 | +0.3 | −0.3 | −8.5 | −8.4 |
Set by set
| Set | Dayana Yastremska | Barbora Krejcikova | Net, Dayana | |
|---|---|---|---|---|
| 1 | −1.9 | −5.5 | +3.6 | |
| 2 | −2.6 | −3.0 | +0.4 |
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.
Dayana Yastremska serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 42% 91% | 19% 40% | 38% 80% |
| 2 | 38% 78% | 10% 60% | 52% 60% |
Within sets +0.22 per 100 first serves, every two to three service games
Barbora Krejcikova serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 45% 78% | 10% 0% | 45% 67% |
| 2 | 53% 62% | 8% 33% | 40% 81% |
Within sets −0.06 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.
Dayana Yastremska
5.0 points left on the table across 174 shots 2.85 per 100 shots
- Return of a 1st serve, wide, ad court hit BH down the line ×4; BH crosscourt rates higher · 0.38 pts
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×8; BH crosscourt rates higher · 0.34 pts
- Return of a 2nd serve, wide, deuce court hit FH through the middle ×2; FH inside-out rates higher · 0.23 pts
- Serve +1: deep return to your middle hit BH down the line ×3; BH crosscourt rates higher · 0.21 pts
Barbora Krejcikova
4.6 points left on the table across 179 shots 2.57 per 100 shots
- Rally, shots 5–8: slice to your forehand side, you at net hit FH volley through the middle ×1; FH volley crosscourt rates higher · 0.34 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
- Rally, shots 5–8: drive to your middle hit FH through the middle ×3; FH crosscourt rates higher · 0.21 pts
- Return +1: drive to your middle hit FH through the middle ×3; FH down the line rates higher · 0.19 pts