RallyIQ

Masters Cup · RR · Hard · 17 Nov 2006

Nikolay Davydenko v Rafael Nadal

102–96 in points · Rafael Nadal won

Why it went the way it did

Nikolay Davydenko won 7.9 more points than Rafael Nadal relative to what the serve alone predicted. Rafael Nadal's biggest leaks: slice shot selection −3.9, backhand execution −2.5, touch shot selection −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.

ShotNikolay DavydenkoRafael Nadal
DirSelExecTotalDirSelExecTotal
Serve 1st +0.2 −0.3 +1.5 +1.4 +0.2 −0.3 +1.1 +1.0
Serve 2nd +0.1 −0.1 +1.1 +1.1 −0.2 −0.1 ±0.0 −0.3
Return −0.5 +0.9 −0.7 −0.4 −0.3 −0.1 +0.7 +0.2
Forehand +1.3 +0.8 +0.2 +2.3 +0.8 +1.4 +3.2 +5.4
Backhand +0.4 +0.4 +2.6 +3.5 +0.1 −0.1 −2.5 −2.5
Slice +0.1 −1.0 −0.5 −1.4 −0.2 −3.9 +0.4 −3.7
Net −0.1 +0.6 +0.8 +1.2 +0.2 +0.3 +1.0 +1.5
Touch +0.1 −0.3 +1.0 +0.8 −0.1 −0.9 −0.1 −1.2
Other ±0.0 −0.1 ±0.0 −0.1 ±0.0 ±0.0 +0.2 +0.2
All shots +1.6+0.8 +6.0+8.4 +0.4−3.7 +3.8+0.5

Set by set

SetNikolay DavydenkoRafael NadalNet, Nikolay
1+7.0+0.1 +6.9
2+1.9+0.6 +1.3
3−0.5−0.1 −0.4

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.

Nikolay Davydenko serving

SetWideBodyT
1 52% 81% 3% 100% 45% 71%
2 60% 67% 4% 100% 36% 78%
3 56% 71% 8% 50% 36% 78%

Set to set +1.25 per 100 first serves in sets 2+

Within sets +1.04 per 100 first serves, every two to three service games

Rafael Nadal serving

SetWideBodyT
1 23% 73% 10% 60% 67% 53%
2 50% 58% – 50% 74%
3 48% 64% 3% 100% 48% 79%

Set to set +1.23 per 100 first serves in sets 2+

Within sets +0.87 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.

Nikolay Davydenko

6.6 points left on the table across 412 shots 1.59 per 100 shots

  1. Return of a 1st serve, T, deuce court hit BH down the line ×9; BH through the middle rates higher · 0.35 pts
  2. Return +1: drive to your forehand side hit FH down the line ×7; FH crosscourt rates higher · 0.31 pts
  3. Return of a 1st serve, wide, ad court hit BH down the line ×3; BH crosscourt rates higher · 0.27 pts
  4. Return of a 2nd serve, body, ad court hit BH through the middle ×6; BH crosscourt rates higher · 0.25 pts

Rafael Nadal

10.0 points left on the table across 386 shots 2.58 per 100 shots

  1. Rally, shots 5–8: drive to your backhand side hit BH slice through the middle ×10; BH slice crosscourt rates higher · 0.73 pts
  2. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×11; BH crosscourt rates higher · 0.43 pts
  3. Return of a 1st serve, wide, ad court hit FH through the middle ×4; FH inside-out rates higher · 0.42 pts
  4. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×8; FH crosscourt rates higher · 0.41 pts