RallyIQ

Paris Masters · F · Hard · 4 Nov 1990

Boris Becker v Stefan Edberg

22–24 in points · result not charted to completion

Why it went the way it did

Stefan Edberg won 1.8 more points than Boris Becker relative to what the serve alone predicted. Boris Becker's biggest leaks: net execution −2.3, backhand execution −0.9, touch execution −0.8.

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.

ShotBoris BeckerStefan Edberg
DirSelExecTotalDirSelExecTotal
Serve 1st −0.2 +0.4 −0.6 −0.3 −0.4 +0.5 −0.7 −0.6
Serve 2nd −0.1 +0.2 +0.3 +0.5 −0.1 +0.3 −0.3 −0.1
Return +0.4 −0.2 −0.1 +0.1 +0.4 −0.3 −0.6 −0.4
Forehand +0.1 +0.5 ±0.0 +0.7 +0.1 +0.4 −0.3 +0.2
Backhand +0.1 +0.1 −0.9 −0.7 +0.3 +0.3 −0.5 +0.1
Slice ±0.0 −0.3 −0.1 −0.4 +0.1 −0.4 +0.7 +0.4
Net +0.3 ±0.0 −2.3 −2.0 +0.5 −0.3 −0.7 −0.6
Touch −0.1 −0.1 −0.8 −1.0 ±0.0 −0.1 −0.1 −0.2
All shots +0.7+0.6 −4.4−3.0 +0.9+0.4 −2.5−1.2

Set by set

SetBoris BeckerStefan EdbergNet, Boris
1−3.0−1.2 −1.8

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.

Boris Becker

2.0 points left on the table across 64 shots 3.12 per 100 shots

  1. Rally, shots 5–8: drive to your backhand side, you at net hit BH volley down the line ×2; BH volley crosscourt rates higher · 0.24 pts
  2. Return +1: volley to your backhand side, opponent at net hit BH lob through the middle ×2; BH lob crosscourt rates higher · 0.19 pts
  3. Serve +1: short return to your forehand side, you at net hit FH volley down the line ×2; FH volley crosscourt rates higher · 0.17 pts
  4. Return of a 2nd serve, body, deuce court, server rushing the net hit BH through the middle ×1; BH crosscourt rates higher · 0.16 pts

Stefan Edberg

1.5 points left on the table across 66 shots 2.35 per 100 shots

  1. Serve +1: short return to your forehand side, you at net hit FH through the middle ×1; FH crosscourt rates higher · 0.16 pts
  2. Return +1: volley to your middle, opponent at net, you at net hit BH volley crosscourt ×1; BH volley down the line rates higher · 0.15 pts
  3. Return of a 2nd serve, body, deuce court, server rushing the net hit BH slice down the line ×1; BH slice crosscourt rates higher · 0.15 pts
  4. Return +1: volley to your forehand side, opponent at net hit FH lob down the line ×1; FH lob crosscourt rates higher · 0.10 pts