RallyIQ

Seoul · F · Hard · 22 Sep 2019

Magda Linette v Karolina Muchova

32–61 in points · Karolina Muchova won

Why it went the way it did

Karolina Muchova won 16.1 more points than Magda Linette relative to what the serve alone predicted. Magda Linette's biggest leaks: backhand execution −3.3, serve 1st execution −2.2, serve 2nd execution −1.6.

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.

ShotMagda LinetteKarolina Muchova
DirSelExecTotalDirSelExecTotal
Serve 1st +0.4 ±0.0 −2.2 −1.9 ±0.0 ±0.0 +0.7 +0.7
Serve 2nd ±0.0 ±0.0 −1.6 −1.6 ±0.0 ±0.0 +0.8 +0.8
Return −0.1 −0.3 −1.3 −1.7 +0.2 ±0.0 +1.8 +2.0
Forehand −0.2 +0.7 −0.8 −0.3 −0.4 +2.0 +0.8 +2.3
Backhand +0.3 +1.2 −3.3 −1.8 −0.1 +0.4 +2.6 +2.9
Slice −0.2 −0.5 −0.3 −1.0 −0.1 −2.3 +0.9 −1.4
Net +0.1 +0.2 −1.1 −0.7 −0.1 −0.4 +0.8 +0.3
Touch +0.1 −0.4 −0.1 −0.4 −0.2 −0.4 −0.4 −0.9
All shots +0.4+0.9 −10.6−9.4 −0.7−0.7 +8.1+6.7

Set by set

SetMagda LinetteKarolina MuchovaNet, Magda
1−6.5+1.6 −8.2
2−2.8+5.1 −7.9

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.

Magda Linette serving

SetWideBodyT
1 58% 53% 6% 0% 36% 33%
2 65% 53% 8% 0% 27% 43%

Set to set +1.00 per 100 first serves in sets 2+

Within sets +2.31 per 100 first serves, every two to three service games

Karolina Muchova serving

SetWideBodyT
1 27% 100% 27% 75% 47% 71%
2 37% 71% 11% 100% 53% 90%

Within sets −0.13 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.

Magda Linette

4.8 points left on the table across 173 shots 2.79 per 100 shots

  1. Rally, shots 5–8: lob to your middle, you at net hit Smash through the middle ×1; Smash crosscourt rates higher · 0.25 pts
  2. Long rally, 9+: drive to your middle hit BH through the middle ×4; BH down the line rates higher · 0.22 pts
  3. Rally, shots 5–8: drive to your middle hit FH through the middle ×3; FH crosscourt rates higher · 0.21 pts
  4. Return of a 2nd serve, body, deuce court hit BH through the middle ×4; BH crosscourt rates higher · 0.18 pts

Karolina Muchova

5.3 points left on the table across 178 shots 2.97 per 100 shots

  1. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×6; FH crosscourt rates higher · 0.33 pts
  2. Long rally, 9+: drive to your middle, you at net hit BH volley through the middle ×1; BH volley crosscourt rates higher · 0.28 pts
  3. Rally, shots 5–8: drive to your middle hit FH through the middle ×4; FH crosscourt rates higher · 0.28 pts
  4. Rally, shots 5–8: volley to your backhand side, opponent at net hit BH lob down the line ×1; BH lob crosscourt rates higher · 0.24 pts