Wimbledon · R16 · Grass · 2 Jul 1997
Pete Sampras v Petr Korda
185–161 in points · Pete Sampras won
Why it went the way it did
Pete Sampras won 17.0 more points than Petr Korda relative to what the serve alone predicted. Petr Korda's biggest leaks: serve 2nd shot selection −7.8, serve 1st shot selection −4.1, net execution −3.6.
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 | Petr Korda | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.8 | −0.8 | +10.9 | +10.9 | +0.3 | −4.1 | +0.1 | −3.6 |
| Serve 2nd | +0.3 | +1.7 | +1.1 | +3.0 | +0.1 | −7.8 | +6.8 | −0.9 |
| Return | −0.9 | −0.7 | −5.0 | −6.5 | −0.8 | +0.9 | +0.4 | +0.4 |
| Forehand | +0.2 | +1.2 | −4.7 | −3.4 | −0.2 | −0.3 | +0.3 | −0.2 |
| Backhand | +0.6 | ±0.0 | +1.2 | +1.8 | ±0.0 | +1.3 | −3.1 | −1.8 |
| Slice | −0.5 | −0.9 | +0.1 | −1.3 | −0.2 | −0.8 | +0.4 | −0.6 |
| Net | +1.6 | +0.2 | −0.2 | +1.6 | −0.4 | ±0.0 | −3.6 | −4.0 |
| Touch | ±0.0 | +0.3 | −0.1 | +0.2 | +0.1 | −0.5 | +0.4 | +0.1 |
| All shots | +2.1 | +1.1 | +3.2 | +6.4 | −1.1 | −11.2 | +1.7 | −10.6 |
Set by set
| Set | Pete Sampras | Petr Korda | Net, Pete | |
|---|---|---|---|---|
| 1 | +1.4 | −3.9 | +5.3 | |
| 2 | +5.6 | −1.0 | +6.6 | |
| 3 | −1.5 | −2.1 | +0.6 | |
| 4 | −1.2 | −0.7 | −0.5 | |
| 5 | +2.0 | −3.0 | +4.9 |
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 | 46% 64% | 4% 100% | 50% 100% |
| 2 | 39% 67% | 4% 100% | 57% 100% |
| 3 | 56% 71% | 2% 0% | 42% 71% |
| 4 | 42% 56% | 3% 100% | 55% 76% |
| 5 | 9% 100% | 9% 50% | 82% 94% |
Set to set +1.14 per 100 first serves in sets 2+
Within sets +0.99 per 100 first serves, every two to three service games
Petr Korda serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 41% 58% | 7% 100% | 52% 60% |
| 2 | 52% 64% | – | 48% 54% |
| 3 | 52% 68% | 7% 50% | 41% 73% |
| 4 | 61% 65% | 10% 40% | 29% 87% |
| 5 | 61% 76% | 4% 0% | 36% 60% |
Set to set +0.01 per 100 first serves in sets 2+
Within sets −0.33 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
12.2 points left on the table across 364 shots 3.36 per 100 shots
- Return of a 1st serve, wide, ad court hit BH slice down the line ×7; BH slice crosscourt rates higher · 1.35 pts
- Return of a 2nd serve, T, deuce court, server rushing the net hit BH through the middle ×4; BH crosscourt rates higher · 0.48 pts
- Return of a 1st serve, T, deuce court, server rushing the net hit BH through the middle ×5; BH crosscourt rates higher · 0.47 pts
- Return +1: volley to your forehand side, opponent at net hit FH through the middle ×2; FH crosscourt rates higher · 0.46 pts
Petr Korda
13.5 points left on the table across 332 shots 4.07 per 100 shots
- Return of a 1st serve, wide, deuce court, server rushing the net hit BH down the line ×12; BH crosscourt rates higher · 0.89 pts
- Return of a 2nd serve, T, ad court, server rushing the net hit BH through the middle ×7; BH crosscourt rates higher · 0.84 pts
- Return of a 1st serve, T, deuce court, server rushing the net hit FH down the line ×5; FH crosscourt rates higher · 0.56 pts
- Return +1: volley to your forehand side, opponent at net hit FH through the middle ×2; FH crosscourt rates higher · 0.46 pts