Roland Garros · SF · Clay · 8 Jun 2018
Rafael Nadal v Juan Martin Del Potro
87–61 in points · Rafael Nadal won
Why it went the way it did
Rafael Nadal won 10.8 more points than Juan Martin Del Potro relative to what the serve alone predicted. Juan Martin Del Potro's biggest leaks: forehand execution −4.6, slice shot selection −1.7, touch shot selection −0.9.
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 | Rafael Nadal | Juan Martin Del Potro | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | −0.2 | +0.1 | −1.8 | −1.9 | +0.2 | ±0.0 | +0.4 | +0.6 |
| Serve 2nd | ±0.0 | +0.1 | −0.3 | −0.2 | −0.1 | ±0.0 | +0.2 | +0.1 |
| Return | ±0.0 | +1.9 | −0.4 | +1.4 | −0.1 | +0.2 | +1.1 | +1.2 |
| Forehand | +1.4 | +3.2 | +6.6 | +11.3 | +0.8 | +3.3 | −4.6 | −0.5 |
| Backhand | +0.5 | +0.1 | +6.4 | +6.9 | +0.2 | +0.9 | +2.9 | +4.1 |
| Slice | −0.3 | −1.3 | −0.1 | −1.6 | +0.1 | −1.7 | +1.3 | −0.3 |
| Net | +0.2 | +0.2 | −0.4 | +0.1 | +0.1 | +0.1 | +1.6 | +1.9 |
| Touch | −0.1 | −0.4 | +1.6 | +1.2 | −0.1 | −0.9 | +0.1 | −0.9 |
| All shots | +1.6 | +3.9 | +11.6 | +17.1 | +1.2 | +2.0 | +3.0 | +6.2 |
Set by set
| Set | Rafael Nadal | Juan Martin Del Potro | Net, Rafael | |
|---|---|---|---|---|
| 1 | +6.5 | +7.1 | −0.6 | |
| 2 | +7.6 | +0.5 | +7.1 | |
| 3 | +2.9 | −1.4 | +4.3 |
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.
Rafael Nadal serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 57% 65% | 11% 75% | 31% 64% |
| 2 | 56% 79% | 16% 25% | 28% 86% |
| 3 | 22% 60% | 30% 86% | 48% 73% |
Set to set −0.04 per 100 first serves in sets 2+
Within sets +0.12 per 100 first serves, every two to three service games
Juan Martin Del Potro serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 38% 60% | 8% 50% | 54% 79% |
| 2 | 45% 60% | – | 55% 25% |
| 3 | 47% 75% | – | 53% 33% |
Set to set +0.40 per 100 first serves in sets 2+
Within sets +0.23 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.
Rafael Nadal
7.5 points left on the table across 332 shots 2.24 per 100 shots
- Return of a 1st serve, wide, ad court hit FH crosscourt ×7; FH inside-out rates higher · 0.61 pts
- Return of a 1st serve, T, deuce court hit FH through the middle ×9; FH inside-in rates higher · 0.49 pts
- Return +1: drive to your forehand side hit FH through the middle ×5; 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
Juan Martin Del Potro
6.4 points left on the table across 341 shots 1.88 per 100 shots
- Return of a 1st serve, wide, ad court hit BH through the middle ×9; BH crosscourt rates higher · 0.35 pts
- Long rally, 9+: drive to your backhand side hit BH through the middle ×8; BH crosscourt rates higher · 0.33 pts
- Return +1: drive to your forehand side hit FH through the middle ×4; FH crosscourt rates higher · 0.23 pts
- Return of a 2nd serve, T, ad court hit FH crosscourt ×3; FH inside-in rates higher · 0.23 pts