Australian Open · Q3 · Hard · 15 Jan 2026
Lukas Klein v Michael Zheng
101–109 in points · Michael Zheng won
Why it went the way it did
Michael Zheng won 6.4 more points than Lukas Klein relative to what the serve alone predicted. Lukas Klein's biggest leaks: backhand execution −3.9, serve 1st execution −1.9, slice shot selection −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 | Lukas Klein | Michael Zheng | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | −0.3 | +0.1 | −1.9 | −2.2 | +0.2 | −0.2 | −1.0 | −1.0 |
| Serve 2nd | ±0.0 | ±0.0 | −0.2 | −0.3 | ±0.0 | −0.1 | +1.6 | +1.5 |
| Return | +0.5 | −0.4 | −1.7 | −1.6 | −0.1 | +1.5 | −0.9 | +0.5 |
| Forehand | +0.3 | +3.6 | −1.5 | +2.4 | −0.3 | +3.4 | +1.3 | +4.3 |
| Backhand | +0.3 | +1.0 | −3.9 | −2.7 | −0.4 | +0.8 | −3.6 | −3.3 |
| Slice | +0.2 | −1.9 | −1.7 | −3.4 | +0.1 | −2.6 | ±0.0 | −2.5 |
| Net | +0.8 | +0.1 | +0.2 | +1.1 | +0.2 | +0.1 | +0.5 | +0.8 |
| Touch | ±0.0 | −0.5 | +1.5 | +1.0 | +0.1 | −1.0 | +1.3 | +0.3 |
| All shots | +1.8 | +2.0 | −9.4 | −5.6 | −0.2 | +1.8 | −0.9 | +0.7 |
Set by set
| Set | Lukas Klein | Michael Zheng | Net, Lukas | |
|---|---|---|---|---|
| 1 | +0.3 | −2.6 | +2.9 | |
| 2 | −4.5 | +1.2 | −5.7 | |
| 3 | −1.4 | +2.2 | −3.6 |
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.
Lukas Klein serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 53% 69% | 17% 80% | 30% 67% |
| 2 | 53% 57% | 8% 67% | 40% 50% |
| 3 | 47% 70% | 21% 78% | 33% 57% |
Set to set +1.87 per 100 first serves in sets 2+
Within sets +0.53 per 100 first serves, every two to three service games
Michael Zheng serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 52% 47% | 3% 100% | 45% 73% |
| 2 | 52% 77% | – | 48% 67% |
| 3 | 44% 76% | 10% 100% | 46% 72% |
Set to set +0.28 per 100 first serves in sets 2+
Within sets −0.25 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.
Lukas Klein
5.6 points left on the table across 312 shots 1.79 per 100 shots
- Rally, shots 5–8: drive to your forehand side, you at net hit FH volley down the line ×2; FH volley crosscourt rates higher · 0.28 pts
- Rally, shots 5–8: drive to your backhand side, you at net hit BH volley down the line ×2; BH volley crosscourt rates higher · 0.24 pts
- Return of a 1st serve, wide, ad court hit BH slice through the middle ×3; BH slice crosscourt rates higher · 0.23 pts
- Return of a 1st serve, wide, ad court hit BH slice down the line ×1; BH slice crosscourt rates higher · 0.17 pts
Michael Zheng
7.6 points left on the table across 305 shots 2.50 per 100 shots
- Return +1: drive to your backhand side hit BH through the middle ×9; BH crosscourt rates higher · 0.35 pts
- Return of a 2nd serve, wide, ad court hit BH through the middle ×6; BH crosscourt rates higher · 0.33 pts
- Rally, shots 5–8: drive to your backhand side, you at net hit BH volley down the line ×2; BH volley crosscourt rates higher · 0.24 pts
- Serve +1: mid-depth return to your backhand side hit FH through the middle ×2; FH inside-in rates higher · 0.24 pts