RallyIQ

US Open · R64 · Hard · 28 Aug 2002

Elena Bovina v Jelena Dokic

65–50 in points · Elena Bovina won

Why it went the way it did

Elena Bovina won 7.6 more points than Jelena Dokic relative to what the serve alone predicted. Jelena Dokic's biggest leaks: backhand execution −2.2, serve 1st execution −1.6, forehand execution −0.9.

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.

ShotElena BovinaJelena Dokic
DirSelExecTotalDirSelExecTotal
Serve 1st ±0.0 +0.1 +1.4 +1.5 +0.4 ±0.0 −1.6 −1.2
Serve 2nd ±0.0 ±0.0 +0.7 +0.7 ±0.0 ±0.0 +0.2 +0.2
Return −0.4 +0.1 +1.8 +1.4 +0.1 −0.3 +1.3 +1.2
Forehand −0.5 +1.2 +0.8 +1.5 +0.5 +0.9 −0.9 +0.5
Backhand +0.2 +1.1 −1.5 −0.2 +0.4 +0.2 −2.2 −1.6
Slice +0.1 −0.8 −0.7 −1.4 −0.1 −0.7 −0.1 −0.8
Net −0.1 +0.2 +1.8 +1.8 −0.1 +0.4 ±0.0 +0.4
Touch ±0.0 ±0.0 ±0.0 ±0.0 ±0.0 ±0.0 −0.9 −0.8
All shots −0.8+1.8 +4.2+5.3 +1.3+0.5 −4.1−2.3

Set by set

SetElena BovinaJelena DokicNet, Elena
1+4.0+1.1 +2.9
2+1.3−3.4 +4.7

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.

Elena Bovina serving

SetWideBodyT
1 43% 47% 26% 67% 31% 73%
2 45% 90% 9% 100% 45% 60%

Set to set −0.52 per 100 first serves in sets 2+

Within sets −0.24 per 100 first serves, every two to three service games

Jelena Dokic serving

SetWideBodyT
1 39% 23% 9% 67% 52% 71%
2 64% 56% – 36% 56%

Set to set −4.90 per 100 first serves in sets 2+

Within sets −1.14 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.

Elena Bovina

5.4 points left on the table across 177 shots 3.07 per 100 shots

  1. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×7; FH crosscourt rates higher · 0.38 pts
  2. Serve +1: mid-depth return to your forehand side hit FH through the middle ×5; FH crosscourt rates higher · 0.34 pts
  3. Long rally, 9+: drive to your middle hit BH through the middle + approach ×1; BH down the line + approach rates higher · 0.28 pts
  4. Return +1: drive to your forehand side hit FH through the middle ×4; FH crosscourt rates higher · 0.25 pts

Jelena Dokic

3.9 points left on the table across 181 shots 2.16 per 100 shots

  1. Return of a 1st serve, wide, deuce court hit FH down the line ×4; FH crosscourt rates higher · 0.27 pts
  2. Long rally, 9+: drive to your backhand side, you at net hit BH volley through the middle ×1; BH volley crosscourt rates higher · 0.19 pts
  3. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×4; BH crosscourt rates higher · 0.17 pts
  4. Return of a 2nd serve, wide, deuce court hit FH crosscourt ×3; FH inside-out rates higher · 0.17 pts