Roland Garros · R128 · Clay · 25 May 1992
Pete Sampras v Marc Rosset
166–166 in points · Pete Sampras won
Why it went the way it did
Pete Sampras won 3.6 more points than Marc Rosset relative to what the serve alone predicted. Marc Rosset's biggest leaks: return execution −6.6, slice shot selection −2.3, slice execution −1.4.
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 | Pete Sampras | Marc Rosset | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.2 | +0.7 | +4.6 | +5.5 | −0.4 | −0.1 | +4.5 | +3.9 |
| Serve 2nd | ±0.0 | −0.2 | +0.8 | +0.6 | ±0.0 | −0.2 | −1.2 | −1.4 |
| Return | −0.3 | −0.5 | +0.9 | +0.1 | −0.1 | +0.8 | −6.6 | −5.9 |
| Forehand | +0.3 | +4.3 | −1.6 | +3.1 | +0.1 | +5.1 | +0.6 | +5.7 |
| Backhand | −0.3 | +0.6 | −1.5 | −1.2 | +0.2 | +1.3 | −0.1 | +1.3 |
| Slice | +0.2 | −2.5 | −1.3 | −3.7 | +0.2 | −2.3 | −1.4 | −3.5 |
| Net | +0.6 | −0.2 | +1.3 | +1.7 | +0.5 | +0.3 | +1.4 | +2.1 |
| Touch | −0.2 | −0.5 | −0.5 | −1.1 | ±0.0 | −0.6 | −0.2 | −0.8 |
| All shots | +0.5 | +1.8 | +2.7 | +5.0 | +0.4 | +4.1 | −3.1 | +1.4 |
Set by set
| Set | Pete Sampras | Marc Rosset | Net, Pete | |
|---|---|---|---|---|
| 1 | +4.7 | +2.5 | +2.2 | |
| 2 | −4.5 | −0.5 | −4.0 | |
| 3 | +2.7 | −0.9 | +3.6 | |
| 4 | −1.2 | ±0.0 | −1.2 | |
| 5 | +3.3 | +0.3 | +3.0 |
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.
Pete Sampras serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 17% 71% | 7% 67% | 76% 68% |
| 2 | 37% 50% | 3% 0% | 61% 57% |
| 3 | 32% 75% | 12% 33% | 56% 93% |
| 4 | 50% 0% | – | 50% 100% |
| 5 | 24% 75% | – | 76% 65% |
Set to set +1.22 per 100 first serves in sets 2+
Within sets +1.96 per 100 first serves, every two to three service games
Marc Rosset serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 30% 46% | 21% 78% | 49% 67% |
| 2 | 12% 75% | 24% 75% | 64% 57% |
| 3 | 33% 58% | 11% 50% | 56% 70% |
| 4 | 20% 100% | – | 80% 75% |
| 5 | 34% 60% | 3% 0% | 62% 61% |
Set to set −0.04 per 100 first serves in sets 2+
Within sets −0.69 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.
Pete Sampras
15.2 points left on the table across 498 shots 3.05 per 100 shots
- Return of a 1st serve, T, ad court hit FH through the middle ×7; FH inside-in rates higher · 1.14 pts
- Return of a 1st serve, T, ad court hit FH down the line ×4; FH inside-in rates higher · 0.73 pts
- Return +1: drive to your forehand side hit FH through the middle ×8; FH crosscourt rates higher · 0.47 pts
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×11; BH crosscourt rates higher · 0.43 pts
Marc Rosset
15.3 points left on the table across 487 shots 3.14 per 100 shots
- Return of a 1st serve, T, ad court hit FH through the middle ×11; FH inside-in rates higher · 1.79 pts
- Return of a 1st serve, T, ad court hit FH down the line ×5; FH inside-in rates higher · 0.92 pts
- Return of a 2nd serve, wide, deuce court hit FH through the middle ×8; FH inside-in rates higher · 0.64 pts
- Rally, shots 5–8: drive to your backhand side hit FH through the middle ×6; FH inside-in rates higher · 0.57 pts