Pro Feature
Draw Difficulty Index
Our proprietary metric measuring the true difficulty of a champion's path to the title — based on opponent seed strength, seeded opponent density, and physical match load.
Example Data — Fictional player "John Doe"
14
Grand Slam Titles
64
Average DDI
84.2
Highest DDI
Roland Garros 2019
Hardest Title Run
Draw Difficulty Index (DDI) — Grand Slam Titles
How is this calculated?The DDI measures how difficult a player's path to the title was, based on opponent seed strength, seeded opponent density, and physical match load.
Roland Garros
2019
Seed Difficulty:
38.5
Seed Density:
28.2
Match Load:
17.5
Wimbledon
2017
Seed Difficulty:
33.8
Seed Density:
24.1
Match Load:
15.2
Australian Open
2021
Seed Difficulty:
29.4
Seed Density:
21.6
Match Load:
13.5
US Open
2018
Seed Difficulty:
25.1
Seed Density:
18.9
Match Load:
11.8
Roland Garros
2022
Seed Difficulty:
19.6
Seed Density:
13.5
Match Load:
9.2
Understanding DDI Scores
80+
Legendary — all-time great run
70–79
Historic — exceptional draw
60–69
Extremely Difficult
50–59
Very Difficult
40–49
Difficult
<40
Moderate
Three components: Seed Difficulty (quality of seeded opponents faced), Seed Density (how many seeded opponents in the draw), and Match Load (physical toll from sets played and tight matches).
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