RallyIQ

Olympics · R64 · Clay · 28 Jul 2024

Caroline Wozniacki v Mayar Sherif

93–88 in points · Caroline Wozniacki won

Why it went the way it did

Caroline Wozniacki won 2.5 more points than Mayar Sherif relative to what the serve alone predicted. Mayar Sherif's biggest leaks: slice shot selection −3.6, touch execution −1.9, touch shot selection −0.6.

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.

ShotCaroline WozniackiMayar Sherif
DirSelExecTotalDirSelExecTotal
Serve 1st +0.1 ±0.0 ±0.0 +0.1 +0.1 ±0.0 +2.6 +2.7
Serve 2nd ±0.0 ±0.0 +1.7 +1.7 −0.1 ±0.0 +0.3 +0.2
Return +0.1 −0.5 +3.8 +3.4 +0.2 +0.1 +4.1 +4.4
Forehand +0.7 +3.8 +2.9 +7.4 +1.8 +5.7 −0.1 +7.4
Backhand +1.2 +0.5 +2.6 +4.3 −0.5 +1.3 −0.2 +0.5
Slice +0.1 −2.7 −0.7 −3.4 −0.3 −3.6 +0.2 −3.6
Net −0.1 +0.5 +0.2 +0.6 +0.3 +0.8 ±0.0 +1.0
Touch −0.1 −1.2 +0.4 −0.9 +0.4 −0.6 −1.9 −2.0
All shots +1.7+0.4 +11.0+13.2 +1.9+3.7 +5.0+10.7

Set by set

SetCaroline WozniackiMayar SherifNet, Caroline
1+3.0+6.9 −3.9
2+5.6+2.7 +2.9
3+4.6+1.1 +3.5

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.

Caroline Wozniacki serving

SetWideBodyT
1 57% 33% 19% 75% 24% 40%
2 53% 53% 22% 63% 25% 67%
3 55% 67% 18% 67% 27% 56%

Set to set −0.14 per 100 first serves in sets 2+

Within sets −0.53 per 100 first serves, every two to three service games

Mayar Sherif serving

SetWideBodyT
1 56% 44% 9% 100% 34% 73%
2 44% 42% 26% 55% 30% 62%
3 56% 67% 19% 33% 25% 25%

Set to set +0.74 per 100 first serves in sets 2+

Within sets +0.45 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.

Caroline Wozniacki

8.3 points left on the table across 437 shots 1.89 per 100 shots

  1. Return +1: drive to your forehand side hit FH through the middle ×6; FH crosscourt rates higher · 0.38 pts
  2. Rally, shots 5–8: drive to your forehand side hit FH down the line ×13; FH crosscourt rates higher · 0.24 pts
  3. Rally, shots 5–8: volley to your middle, opponent at net hit FH through the middle ×1; FH crosscourt rates higher · 0.24 pts
  4. Return of a 2nd serve, body, deuce court hit BH through the middle ×4; BH crosscourt rates higher · 0.24 pts

Mayar Sherif

10.0 points left on the table across 457 shots 2.19 per 100 shots

  1. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×17; BH crosscourt rates higher · 0.73 pts
  2. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×8; FH crosscourt rates higher · 0.43 pts
  3. Long rally, 9+: drive to your backhand side hit BH through the middle ×8; BH crosscourt rates higher · 0.42 pts
  4. Return +1: drive to your backhand side hit BH through the middle ×8; BH crosscourt rates higher · 0.38 pts