| Duffy vs Kazuya | 167–202 | 45.26% |
| Duffy vs Heihachi | 133–202 | 39.70% |
| Duffy vs King | 109–156 | 41.13% |
| Duffy vs Jin | 125–130–1 | 49.02% |
| Duffy vs Dragunov | 93–110–1 | 45.81% |
| Duffy vs Bryan | 80–97 | 45.20% |
| Duffy vs Hwoarang | 75–97 | 43.60% |
| Duffy vs Steve | 56–80 | 41.18% |
| Duffy vs Law | 50–70 | 41.67% |
| Duffy vs Reina | 45–64 | 41.28% |
| Duffy vs Yoshimitsu | 45–60 | 42.86% |
| Duffy vs Victor | 40–53 | 43.01% |
| Duffy vs Eddy | 42–41 | 50.60% |
| Duffy vs Paul | 24–48 | 33.33% |
| Duffy vs Nina | 20–45 | 30.77% |
| Duffy vs Jun | 28–36 | 43.75% |
| Duffy vs Devil Jin | 22–40 | 35.48% |
| Duffy vs Asuka | 15–42 | 26.32% |
| Duffy vs Lars | 23–29 | 44.23% |
| Duffy vs Lili | 15–35 | 30.00% |
| Duffy vs Azucena | 21–29 | 42.00% |
| Duffy vs Lee | 19–26 | 42.22% |
| Duffy vs Jack-8 | 17–17 | 50.00% |
| Duffy vs Feng | 7–25 | 21.88% |
| Duffy vs Claudio | 8–22 | 26.67% |
| Duffy vs Leo | 13–15 | 46.43% |
| Duffy vs Alisa | 9–17 | 34.62% |
| Duffy vs Leroy | 14–10 | 58.33% |
| Duffy vs Lidia | 9–14 | 39.13% |
| Duffy vs Xiaoyu | 9–9 | 50.00% |
| Duffy vs Kuma | 4–13 | 23.53% |
| Duffy vs Shaheen | 7–9 | 43.75% |
| Duffy vs Panda | 4–11 | 26.67% |
| Duffy vs Raven | 5–5 | 50.00% |
| Duffy vs Zafina | 3–3 | 50.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.