RallyIQ

Canada Masters · R64 · Hard · 9 Aug 2022

Sebastian Baez v Nick Kyrgios

62–72 in points · Nick Kyrgios won

Why it went the way it did

Nick Kyrgios won 5.0 more points than Sebastian Baez relative to what the serve alone predicted. Sebastian Baez's biggest leaks: slice shot selection −4.1, forehand direction choices −1.9, forehand execution −1.8.

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.

ShotSebastian BaezNick Kyrgios
DirSelExecTotalDirSelExecTotal
Serve 1st −0.3 −0.1 +0.6 +0.2 +0.4 +0.2 +3.3 +3.9
Serve 2nd ±0.0 ±0.0 ±0.0 −0.1 +0.1 +0.4 +1.0 +1.4
Return −0.4 −1.1 +2.2 +0.8 ±0.0 +0.8 +1.6 +2.5
Forehand −1.9 +2.3 −1.8 −1.4 −0.9 +1.1 −0.5 −0.3
Backhand −1.1 ±0.0 +2.9 +1.9 −0.6 −0.3 −1.5 −2.4
Slice −0.5 −4.1 −0.7 −5.3 ±0.0 −1.5 −0.3 −1.9
Net −0.4 +0.2 +0.5 +0.3 −0.6 +0.9 +1.0 +1.2
Touch +0.1 −0.6 +2.0 +1.6 −0.1 −0.1 −0.8 −1.0
Other ±0.0 ±0.0 ±0.0 ±0.0 ±0.0 ±0.0 −0.5 −0.6
All shots −4.5−3.4 +5.8−2.2 −1.7+1.4 +3.1+2.8

Set by set

SetSebastian BaezNick KyrgiosNet, Sebastian
1−0.3+0.3 −0.6
2−1.9+2.5 −4.3

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.

Sebastian Baez serving

SetWideBodyT
1 25% 56% 19% 43% 56% 60%
2 29% 67% 19% 67% 52% 50%

Set to set +0.53 per 100 first serves in sets 2+

Within sets +1.35 per 100 first serves, every two to three service games

Nick Kyrgios serving

SetWideBodyT
1 49% 53% – 51% 61%
2 25% 100% – 75% 63%

Set to set +1.07 per 100 first serves in sets 2+

Within sets +1.05 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.

Sebastian Baez

11.8 points left on the table across 271 shots 4.35 per 100 shots

  1. Serve +1: drive to your middle hit FH through the middle ×12; FH crosscourt rates higher · 1.49 pts
  2. Serve +1: drive to your middle hit BH through the middle ×9; BH crosscourt rates higher · 0.77 pts
  3. Rally, shots 5–8: drive to your middle, you at net hit BH volley through the middle ×3; BH volley crosscourt rates higher · 0.65 pts
  4. Rally, shots 5–8: drive to your backhand side hit BH through the middle ×15; BH crosscourt rates higher · 0.58 pts

Nick Kyrgios

8.9 points left on the table across 283 shots 3.13 per 100 shots

  1. Serve +1: drive to your middle hit FH through the middle ×3; FH crosscourt rates higher · 0.37 pts
  2. Rally, shots 5–8: drive to your middle hit FH through the middle ×6; FH crosscourt rates higher · 0.34 pts
  3. Rally, shots 5–8: drop shot to your middle hit FH through the middle ×1; FH down the line rates higher · 0.31 pts
  4. Rally, shots 5–8: drive to your forehand side hit FH through the middle ×6; FH crosscourt rates higher · 0.30 pts