RallyIQ

Marrakech · R32 · Clay · 9 Apr 2019

Robin Haase v Malek Jaziri

58–45 in points · Robin Haase won

Why it went the way it did

Robin Haase won 5.4 more points than Malek Jaziri relative to what the serve alone predicted. Malek Jaziri's biggest leaks: slice shot selection −2.0, return execution −1.8, forehand execution −1.3.

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.

ShotRobin HaaseMalek Jaziri
DirSelExecTotalDirSelExecTotal
Serve 1st ±0.0 −0.1 +1.3 +1.3 ±0.0 ±0.0 −0.3 −0.3
Serve 2nd ±0.0 +0.1 −0.6 −0.6 ±0.0 ±0.0 +0.2 +0.2
Return −0.4 −0.4 −2.1 −2.9 −0.4 −0.9 −1.8 −3.0
Forehand −0.2 +1.6 +2.3 +3.8 −0.1 +1.2 −1.3 −0.2
Backhand ±0.0 −0.2 +0.9 +0.7 −0.1 +0.2 +2.1 +2.2
Slice +0.1 −1.6 +0.6 −0.9 +0.1 −2.0 −0.5 −2.4
Net ±0.0 +0.1 +0.9 +1.1 −0.1 +0.1 +0.2 +0.2
Touch ±0.0 −0.3 ±0.0 −0.3 −0.1 −0.1 +0.2 −0.1
All shots −0.4−0.8 +3.3+2.1 −0.6−1.5 −1.2−3.3

Set by set

SetRobin HaaseMalek JaziriNet, Robin
1−2.1−2.4 +0.3
2+4.2−0.9 +5.1

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.

Robin Haase serving

SetWideBodyT
1 38% 46% 15% 80% 47% 75%
2 71% 93% – 29% 100%

Set to set −1.35 per 100 first serves in sets 2+

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

Malek Jaziri serving

SetWideBodyT
1 40% 88% 5% 100% 55% 55%
2 50% 69% 12% 67% 38% 70%

Within sets +0.65 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.

Robin Haase

5.3 points left on the table across 153 shots 3.47 per 100 shots

  1. Return of a 1st serve, T, ad court hit FH down the line ×4; FH inside-in rates higher · 0.73 pts
  2. Return of a 1st serve, T, ad court hit FH through the middle ×3; FH inside-in rates higher · 0.49 pts
  3. Return of a 1st serve, wide, ad court hit BH slice through the middle ×3; BH slice crosscourt rates higher · 0.25 pts
  4. Return of a 1st serve, T, ad court hit FH crosscourt ×1; FH inside-in rates higher · 0.20 pts

Malek Jaziri

4.4 points left on the table across 153 shots 2.87 per 100 shots

  1. Long rally, 9+: drive to your forehand side hit FH through the middle ×4; FH crosscourt rates higher · 0.22 pts
  2. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×5; BH crosscourt rates higher · 0.19 pts
  3. Rally, shots 5–8: lob to your middle, you at net hit Smash through the middle ×1; Smash crosscourt rates higher · 0.19 pts
  4. Return of a 1st serve, T, ad court hit FH down the line ×1; FH inside-in rates higher · 0.18 pts