Australian Open · R16 · Hard · 26 Jan 2020
Tennys Sandgren v Fabio Fognini
141–133 in points · Tennys Sandgren won
Why it went the way it did
Tennys Sandgren won 2.1 more points than Fabio Fognini relative to what the serve alone predicted. Fabio Fognini's biggest leaks: serve 1st execution −5.9, slice shot selection −5.8, return shot selection −4.0.
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 | Tennys Sandgren | Fabio Fognini | ||||||
|---|---|---|---|---|---|---|---|---|
| Dir | Sel | Exec | Total | Dir | Sel | Exec | Total | |
| Serve 1st | +0.3 | −0.3 | +2.0 | +2.1 | +0.2 | −0.2 | −5.9 | −5.9 |
| Serve 2nd | ±0.0 | −0.1 | +1.1 | +1.1 | ±0.0 | −0.1 | +1.7 | +1.6 |
| Return | +0.1 | −2.0 | +1.0 | −0.8 | ±0.0 | −4.0 | −2.3 | −6.3 |
| Forehand | −0.4 | +2.9 | −4.5 | −2.1 | −0.1 | +3.7 | −3.1 | +0.6 |
| Backhand | −0.3 | −0.3 | +0.6 | ±0.0 | −0.7 | +0.2 | +2.0 | +1.5 |
| Slice | −0.4 | −5.8 | −0.6 | −6.8 | +0.2 | −5.8 | +4.0 | −1.6 |
| Net | +0.1 | +0.7 | +0.7 | +1.5 | +0.2 | +0.4 | +1.3 | +1.8 |
| Touch | ±0.0 | −0.7 | −0.6 | −1.3 | −0.1 | ±0.0 | −0.7 | −0.8 |
| Other | ±0.0 | −0.4 | −0.2 | −0.5 | ±0.0 | ±0.0 | ±0.0 | ±0.0 |
| All shots | −0.4 | −5.9 | −0.6 | −6.9 | −0.3 | −5.9 | −2.9 | −9.0 |
Set by set
| Set | Tennys Sandgren | Fabio Fognini | Net, Tennys | |
|---|---|---|---|---|
| 1 | −2.7 | +1.5 | −4.1 | |
| 2 | +1.1 | −2.7 | +3.8 | |
| 3 | −5.1 | −3.7 | −1.4 | |
| 4 | −0.2 | −4.1 | +3.9 |
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.
Tennys Sandgren serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 52% 63% | 4% 100% | 43% 65% |
| 2 | 47% 67% | 6% 50% | 47% 60% |
| 3 | 66% 70% | – | 34% 42% |
| 4 | 60% 87% | 8% 100% | 32% 63% |
Set to set +0.71 per 100 first serves in sets 2+
Within sets +1.05 per 100 first serves, every two to three service games
Fabio Fognini serving
| Set | Wide | Body | T |
|---|---|---|---|
| 1 | 49% 88% | 6% 50% | 46% 69% |
| 2 | 44% 50% | 7% 50% | 48% 46% |
| 3 | 62% 67% | 3% 100% | 36% 57% |
| 4 | 55% 59% | 10% 100% | 35% 64% |
Set to set +0.65 per 100 first serves in sets 2+
Within sets +0.55 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.
Tennys Sandgren
12.4 points left on the table across 579 shots 2.15 per 100 shots
- Rally, shots 5–8: drive to your backhand side hit BH through the middle ×15; BH crosscourt rates higher · 0.58 pts
- Long rally, 9+: drive to your forehand side hit FH through the middle ×9; FH crosscourt rates higher · 0.49 pts
- Rally, shots 5–8: drive to your forehand side hit FH through the middle ×9; FH crosscourt rates higher · 0.46 pts
- Long rally, 9+: drive to your middle hit FH through the middle ×8; FH crosscourt rates higher · 0.43 pts
Fabio Fognini
14.8 points left on the table across 589 shots 2.52 per 100 shots
- Long rally, 9+: drive to your backhand side hit BH through the middle ×20; BH crosscourt rates higher · 0.83 pts
- Long rally, 9+: drive to your forehand side hit FH through the middle ×14; FH crosscourt rates higher · 0.77 pts
- Rally, shots 5–8: drive to your backhand side hit BH slice through the middle ×7; BH slice crosscourt rates higher · 0.51 pts
- Return of a 2nd serve, T, ad court hit FH down the line ×6; FH inside-out rates higher · 0.51 pts