RallyIQ

Paris Masters · R32 · Hard · 1 Nov 2017

Rafael Nadal v Hyeon Chung

78–60 in points · result not charted to completion

Why it went the way it did

Rafael Nadal won 9.6 more points than Hyeon Chung relative to what the serve alone predicted. Hyeon Chung's biggest leaks: forehand execution −2.3, serve 1st execution −1.8, slice execution −1.4.

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.

ShotRafael NadalHyeon Chung
DirSelExecTotalDirSelExecTotal
Serve 1st −0.4 −0.1 −0.8 −1.3 ±0.0 −0.1 −1.8 −1.9
Serve 2nd ±0.0 ±0.0 +0.1 +0.1 ±0.0 ±0.0 −0.4 −0.4
Return ±0.0 +0.5 +3.0 +3.5 −0.4 +0.4 +0.3 +0.3
Forehand +0.7 +4.0 −1.5 +3.3 −0.3 +2.6 −2.3 −0.1
Backhand +0.1 +0.3 +3.0 +3.3 −0.1 +1.3 −0.3 +0.9
Slice −0.6 −2.2 +1.5 −1.3 −0.3 −1.0 −1.4 −2.8
Net −0.1 +0.1 +0.3 +0.3 +0.4 +0.9 +0.6 +1.9
Touch ±0.0 −0.3 +0.6 +0.4 +0.1 −0.2 +0.8 +0.6
All shots −0.3+2.4 +6.2+8.2 −0.6+3.9 −4.6−1.3

Set by set

SetRafael NadalHyeon ChungNet, Rafael
1+2.9+0.1 +2.8
2+5.4−1.4 +6.8

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.

Rafael Nadal serving

SetWideBodyT
1 48% 58% 23% 33% 30% 67%
2 48% 77% 22% 67% 30% 75%

Set to set −0.65 per 100 first serves in sets 2+

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

Hyeon Chung serving

SetWideBodyT
1 46% 56% 14% 40% 40% 36%
2 36% 38% 6% 0% 58% 67%

Set to set −1.21 per 100 first serves in sets 2+

Within sets +0.22 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.

Rafael Nadal

10.3 points left on the table across 319 shots 3.23 per 100 shots

  1. Return of a 1st serve, T, deuce court hit FH through the middle ×5; FH inside-out rates higher · 0.53 pts
  2. Return of a 2nd serve, T, ad court hit BH through the middle ×6; BH inside-in rates higher · 0.51 pts
  3. Return +1: drive to your backhand side hit BH slice down the line ×6; BH slice crosscourt rates higher · 0.45 pts
  4. Return of a 1st serve, wide, ad court hit FH crosscourt ×5; FH inside-out rates higher · 0.36 pts

Hyeon Chung

8.0 points left on the table across 319 shots 2.51 per 100 shots

  1. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×12; BH crosscourt rates higher · 0.46 pts
  2. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×6; FH crosscourt rates higher · 0.30 pts
  3. Rally, shots 5–8: volley to your forehand side, opponent at net, you at net hit FH volley through the middle ×1; FH volley crosscourt rates higher · 0.24 pts
  4. Rally, shots 5–8: volley to your middle, opponent at net hit FH through the middle ×1; FH crosscourt rates higher · 0.24 pts