RallyIQ

Wimbledon · R64 · Grass · 1 Jul 2021

Angelique Kerber v Sara Sorribes Tormo

118–105 in points · Angelique Kerber won

Why it went the way it did

Angelique Kerber won 7.8 more points than Sara Sorribes Tormo relative to what the serve alone predicted. Sara Sorribes Tormo's biggest leaks: slice shot selection −19.1, return shot selection −2.4, serve 1st execution −2.3.

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.

ShotAngelique KerberSara Sorribes Tormo
DirSelExecTotalDirSelExecTotal
Serve 1st −0.7 ±0.0 +1.0 +0.2 −0.9 +0.2 −2.3 −3.1
Serve 2nd −0.1 ±0.0 +1.0 +0.8 +0.2 ±0.0 +1.5 +1.7
Return +0.6 +1.8 +7.0 +9.4 +0.5 −2.4 +5.8 +3.8
Forehand +1.3 +2.3 +4.9 +8.5 −1.8 +9.0 +14.5 +21.7
Backhand −0.8 +0.8 +16.7 +16.8 −0.4 +1.5 +2.5 +3.6
Slice −0.4 −5.8 +0.4 −5.8 −0.2 −19.1 +13.8 −5.5
Net −0.1 +0.6 +0.5 +1.0 −0.5 +0.4 +2.6 +2.4
Touch +0.2 −1.6 +1.4 +0.1 +0.1 −1.3 −0.4 −1.6
All shots ±0.0−2.1 +33.0+30.9 −3.0−11.9 +38.0+23.2

Set by set

SetAngelique KerberSara Sorribes TormoNet, Angelique
1+16.7+11.7 +5.0
2+3.4+3.8 −0.3
3+10.7+7.7 +3.1

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.

Angelique Kerber serving

SetWideBodyT
1 50% 71% 24% 75% 26% 67%
2 47% 50% 32% 50% 21% 75%
3 38% 43% 43% 44% 19% 57%

Set to set +0.49 per 100 first serves in sets 2+

Within sets +0.45 per 100 first serves, every two to three service games

Sara Sorribes Tormo serving

SetWideBodyT
1 43% 50% 37% 53% 20% 78%
2 29% 60% 44% 60% 26% 44%
3 38% 58% 25% 25% 38% 17%

Set to set +0.63 per 100 first serves in sets 2+

Within sets −0.08 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.

Angelique Kerber

20.7 points left on the table across 860 shots 2.41 per 100 shots

  1. Long rally, 9+: drive to your backhand side hit BH through the middle ×20; BH crosscourt rates higher · 1.04 pts
  2. Return of a 1st serve, T, ad court hit BH down the line ×6; BH through the middle rates higher · 0.84 pts
  3. Rally, shots 5–8: drive to your middle hit BH through the middle ×17; BH crosscourt rates higher · 0.80 pts
  4. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×16; BH crosscourt rates higher · 0.69 pts

Sara Sorribes Tormo

25.3 points left on the table across 854 shots 2.97 per 100 shots

  1. Rally, shots 5–8: drive to your backhand side hit BH slice through the middle ×32; BH slice crosscourt rates higher · 1.92 pts
  2. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×31; FH crosscourt rates higher · 1.68 pts
  3. Long rally, 9+: drive to your backhand side hit BH slice through the middle ×28; BH slice crosscourt rates higher · 1.46 pts
  4. Return +1: drive to your forehand side hit FH through the middle ×17; FH crosscourt rates higher · 1.07 pts