Gstaad · SF · Hard · 20 Jul 2024
Quentin Halys v Jan Lennard Struff
74–61 in points · Quentin Halys won
Why it went the way it did
Quentin Halys won 6.7 more points than Jan Lennard Struff relative to what the serve alone predicted. Jan Lennard Struff's biggest leaks: slice shot selection −1.6, net direction choices −0.8, serve 2nd execution −0.7.
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 | Quentin Halys | Jan Lennard Struff | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.3 | −0.1 | +3.2 | +3.4 | +0.5 | +0.9 | −0.2 | +1.1 |
| Serve 2nd | −0.1 | ±0.0 | +3.2 | +3.1 | +0.1 | +0.4 | −0.7 | −0.2 |
| Return | +0.1 | −0.2 | +2.2 | +2.1 | +0.1 | +0.2 | +5.5 | +5.7 |
| Forehand | ±0.0 | +0.5 | +2.6 | +3.1 | +0.3 | +0.6 | +1.5 | +2.4 |
| Backhand | +0.2 | +0.3 | +1.8 | +2.3 | +0.1 | ±0.0 | +1.9 | +2.0 |
| Slice | +0.1 | −1.5 | +0.1 | −1.3 | −0.2 | −1.6 | −0.2 | −2.0 |
| Net | −0.1 | +0.7 | +1.0 | +1.6 | −0.8 | +0.4 | +0.1 | −0.3 |
| Touch | ±0.0 | +0.1 | +0.5 | +0.6 | ±0.0 | ±0.0 | −0.4 | −0.4 |
| All shots | +0.5 | −0.3 | +14.7 | +14.9 | ±0.0 | +0.8 | +7.5 | +8.3 |
Set by set
| Set | Quentin Halys | Jan Lennard Struff | Net, Quentin | |
|---|---|---|---|---|
| 1 | +5.5 | +2.4 | +3.1 | |
| 2 | +9.4 | +5.9 | +3.5 |
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.
Quentin Halys serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 55% 65% | – | 45% 79% |
| 2 | 53% 74% | – | 47% 76% |
Set to set +0.20 per 100 first serves in sets 2+
Within sets −0.09 per 100 first serves, every two to three service games
Jan Lennard Struff serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 56% 71% | – | 44% 45% |
| 2 | 60% 62% | – | 40% 71% |
Within sets +0.48 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.
Quentin Halys
3.2 points left on the table across 112 shots 2.86 per 100 shots
- Serve +1: drive to your middle hit BH through the middle ×2; BH crosscourt rates higher · 0.17 pts
- Serve +1: drive to your forehand side hit FH slice through the middle ×1; FH slice down the line rates higher · 0.16 pts
- Serve +1: drive to your forehand side hit FH through the middle ×1; FH crosscourt rates higher · 0.14 pts
- Long rally, 9+: slice to your backhand side, opponent at net, you at net hit BH volley through the middle ×1; BH volley down the line rates higher · 0.14 pts
Jan Lennard Struff
4.1 points left on the table across 110 shots 3.71 per 100 shots
- Serve +1: drive to your backhand side, you at net hit BH volley through the middle ×4; BH volley crosscourt rates higher · 0.85 pts
- Serve +1: drive to your middle hit FH through the middle ×2; FH crosscourt rates higher · 0.25 pts
- Serve +1: drive to your middle, you at net hit FH volley through the middle ×1; FH volley crosscourt rates higher · 0.22 pts
- Serve +1: slice to your middle, you at net hit Smash through the middle ×1; Smash down the line rates higher · 0.18 pts