Australian Open · R128 · Hard · 16 Jan 2023
Stefanos Tsitsipas v Quentin Halys
102–83 in points · Stefanos Tsitsipas won
Why it went the way it did
Stefanos Tsitsipas won 8.8 more points than Quentin Halys relative to what the serve alone predicted. Quentin Halys's biggest leaks: forehand execution −2.6, serve 2nd execution −1.9, return execution −1.9.
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 | Stefanos Tsitsipas | Quentin Halys | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.3 | −0.1 | +1.7 | +1.9 | +0.2 | ±0.0 | +1.3 | +1.5 |
| Serve 2nd | −0.1 | ±0.0 | −1.5 | −1.6 | +0.1 | ±0.0 | −1.9 | −1.9 |
| Return | +0.1 | −1.1 | +1.4 | +0.3 | +0.7 | +0.4 | −1.9 | −0.8 |
| Forehand | +0.1 | +1.5 | +3.8 | +5.4 | ±0.0 | +2.1 | −2.6 | −0.5 |
| Backhand | +0.1 | +0.5 | +0.1 | +0.6 | +0.1 | +0.4 | −0.4 | +0.2 |
| Slice | ±0.0 | −1.8 | +0.1 | −1.7 | ±0.0 | −1.0 | −0.4 | −1.5 |
| Net | −0.1 | −0.1 | +1.0 | +0.8 | +0.1 | +0.2 | +0.2 | +0.5 |
| Touch | −0.2 | −1.4 | +1.2 | −0.5 | +0.1 | +0.4 | −1.4 | −0.9 |
| All shots | +0.2 | −2.6 | +7.7 | +5.3 | +1.2 | +2.4 | −7.0 | −3.4 |
Set by set
| Set | Stefanos Tsitsipas | Quentin Halys | Net, Stefanos | |
|---|---|---|---|---|
| 1 | +4.5 | −0.3 | +4.7 | |
| 2 | +2.8 | −3.0 | +5.8 | |
| 3 | −1.9 | −0.1 | −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.
Stefanos Tsitsipas serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 54% 77% | 4% 100% | 42% 90% |
| 2 | 38% 89% | 4% 100% | 58% 79% |
| 3 | 43% 55% | 2% 100% | 55% 62% |
Set to set −0.56 per 100 first serves in sets 2+
Within sets −1.25 per 100 first serves, every two to three service games
Quentin Halys serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 55% 50% | – | 45% 80% |
| 2 | 52% 65% | 6% 100% | 42% 50% |
| 3 | 37% 69% | 3% 0% | 60% 62% |
Set to set +0.81 per 100 first serves in sets 2+
Within sets +0.04 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.
Stefanos Tsitsipas
5.4 points left on the table across 205 shots 2.62 per 100 shots
- Return of a 1st serve, wide, ad court hit BH slice through the middle ×6; BH slice crosscourt rates higher · 0.45 pts
- Return of a 2nd serve, wide, ad court hit BH through the middle ×5; BH crosscourt rates higher · 0.28 pts
- Serve +1: mid-depth return to your forehand side hit FH through the middle ×2; FH crosscourt rates higher · 0.18 pts
- Serve +1: mid-depth return to your backhand side, you at net hit FH volley inside-out ×1; FH volley inside-in rates higher · 0.18 pts
Quentin Halys
3.9 points left on the table across 208 shots 1.89 per 100 shots
- Serve +1: deep return to your middle hit FH through the middle ×4; FH crosscourt rates higher · 0.29 pts
- Rally, shots 5–8: drive to your backhand side, you at net hit BH volley through the middle ×1; BH volley crosscourt rates higher · 0.26 pts
- Return of a 2nd serve, T, ad court hit FH crosscourt ×3; FH inside-out rates higher · 0.22 pts
- Rally, shots 5–8: drive to your middle, you at net hit BH volley through the middle ×1; BH volley crosscourt rates higher · 0.22 pts