RallyIQ

Linz · SF · Hard · 6 Oct 2014

Anna Lena Friedsam v Karolina Pliskova

88–91 in points · Karolina Pliskova won

Why it went the way it did

Karolina Pliskova won 2.5 more points than Anna Lena Friedsam relative to what the serve alone predicted. Anna Lena Friedsam's biggest leaks: slice shot selection −3.6, touch shot selection −1.8, slice execution −1.1.

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.

ShotAnna Lena FriedsamKarolina Pliskova
DirSelExecTotalDirSelExecTotal
Serve 1st −0.2 ±0.0 +2.8 +2.6 +0.6 ±0.0 +4.7 +5.3
Serve 2nd −0.1 ±0.0 +0.9 +0.8 ±0.0 ±0.0 −0.2 −0.2
Return +0.2 −0.3 +2.1 +2.0 +0.3 −0.3 +3.8 +3.8
Forehand +0.3 +2.4 +2.4 +5.1 +1.1 +1.2 +1.7 +4.1
Backhand −0.1 +1.1 +3.9 +4.9 +0.1 +0.8 −0.5 +0.4
Slice +0.3 −3.6 −1.1 −4.3 +0.1 −3.1 +0.1 −2.9
Net +0.4 +0.7 −0.6 +0.5 −0.2 +0.6 +0.7 +1.0
Touch −0.1 −1.8 −0.7 −2.7 ±0.0 −0.8 +0.8 ±0.0
All shots +0.8−1.6 +9.7+9.0 +1.9−1.5 +11.1+11.5

Set by set

SetAnna Lena FriedsamKarolina PliskovaNet, Anna
1+6.7+2.3 +4.4
2+3.5+7.3 −3.8
3−1.2+1.9 −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.

Anna Lena Friedsam serving

SetWideBodyT
1 38% 83% 25% 63% 38% 50%
2 32% 64% 24% 50% 44% 53%
3 33% 44% 22% 33% 44% 58%

Set to set −0.18 per 100 first serves in sets 2+

Within sets +1.12 per 100 first serves, every two to three service games

Karolina Pliskova serving

SetWideBodyT
1 50% 64% 5% 0% 45% 40%
2 52% 67% – 48% 71%
3 35% 58% 9% 67% 56% 58%

Set to set −0.96 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.

Anna Lena Friedsam

7.2 points left on the table across 315 shots 2.30 per 100 shots

  1. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×11; FH crosscourt rates higher · 0.60 pts
  2. Return +1: drive to your forehand side hit FH through the middle ×7; FH crosscourt rates higher · 0.44 pts
  3. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×8; BH crosscourt rates higher · 0.34 pts
  4. Return of a 2nd serve, body, deuce court hit FH through the middle ×6; FH down the line rates higher · 0.29 pts

Karolina Pliskova

6.6 points left on the table across 321 shots 2.07 per 100 shots

  1. Rally, shots 5–8: drive to your forehand side hit FH volley through the middle ×1; FH volley crosscourt rates higher · 0.32 pts
  2. Rally, shots 5–8: drive to your middle hit BH through the middle ×6; BH crosscourt rates higher · 0.28 pts
  3. Rally, shots 5–8: drive to your backhand side hit BH slice down the line ×3; BH slice crosscourt rates higher · 0.26 pts
  4. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×4; FH crosscourt rates higher · 0.22 pts