RallyIQ

Australian Open · R64 · Hard · 16 Jan 2024

Coco Gauff v Caroline Dolehide

80–63 in points · Coco Gauff won

Why it went the way it did

Coco Gauff won 7.7 more points than Caroline Dolehide relative to what the serve alone predicted. Caroline Dolehide's biggest leaks: slice shot selection −3.9, forehand execution −3.3, return execution −2.4.

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.

ShotCoco GauffCaroline Dolehide
DirSelExecTotalDirSelExecTotal
Serve 1st −0.4 ±0.0 −0.4 −0.8 +0.1 ±0.0 +0.1 +0.1
Serve 2nd ±0.0 ±0.0 −0.2 −0.2 +0.1 ±0.0 +0.3 +0.4
Return +0.1 +0.6 +0.8 +1.4 ±0.0 −1.7 −2.4 −4.1
Forehand −0.1 +2.2 −3.8 −1.6 −0.5 +3.5 −3.3 −0.4
Backhand −0.1 +1.1 +3.9 +4.9 −0.1 +1.0 −1.1 −0.2
Slice −0.1 −2.2 +0.6 −1.8 −0.2 −3.9 +2.1 −2.0
Net −0.6 +0.6 −0.3 −0.3 −0.3 +1.1 −0.4 +0.4
Touch ±0.0 ±0.0 ±0.0 ±0.0 +0.1 +0.1 −0.5 −0.2
All shots −1.2+2.3 +0.6+1.6 −0.9±0.0 −5.2−6.0

Set by set

SetCoco GauffCaroline DolehideNet, Coco
1−0.3−3.0 +2.7
2+1.9−3.0 +5.0

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.

Coco Gauff serving

SetWideBodyT
1 40% 47% 37% 88% 23% 50%
2 41% 57% 26% 78% 32% 64%

Set to set −0.80 per 100 first serves in sets 2+

Within sets −1.29 per 100 first serves, every two to three service games

Caroline Dolehide serving

SetWideBodyT
1 51% 55% 23% 67% 26% 50%
2 56% 47% 15% 75% 30% 38%

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

Within sets +0.76 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.

Coco Gauff

8.6 points left on the table across 305 shots 2.82 per 100 shots

  1. Return of a 2nd serve, wide, deuce court hit FH down the line ×5; FH inside-out rates higher · 0.50 pts
  2. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×7; FH crosscourt rates higher · 0.38 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 1st serve, wide, deuce court hit FH through the middle ×12; FH crosscourt rates higher · 0.30 pts

Caroline Dolehide

9.7 points left on the table across 312 shots 3.11 per 100 shots

  1. Rally, shots 5–8: drive to your middle hit FH through the middle ×7; FH crosscourt rates higher · 0.49 pts
  2. Long rally, 9+: drive to your forehand side, opponent at net, you at net hit FH volley down the line ×1; FH volley crosscourt rates higher · 0.35 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. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×5; FH crosscourt rates higher · 0.27 pts