| Duffy0831 vs King | 12–1 | 92.31% |
| Duffy0831 vs Hwoarang | 8–5 | 61.54% |
| Duffy0831 vs Clive | 8–5 | 61.54% |
| Duffy0831 vs Law | 7–4 | 63.64% |
| Duffy0831 vs Bryan | 10–0 | 100.00% |
| Duffy0831 vs Lars | 7–2 | 77.78% |
| Duffy0831 vs Jin | 6–2 | 75.00% |
| Duffy0831 vs Asuka | 2–4 | 33.33% |
| Duffy0831 vs Devil Jin | 4–2 | 66.67% |
| Duffy0831 vs Steve | 5–0 | 100.00% |
| Duffy0831 vs Reina | 5–0 | 100.00% |
| Duffy0831 vs Lili | 2–2 | 50.00% |
| Duffy0831 vs Dragunov | 2–2 | 50.00% |
| Duffy0831 vs Leo | 2–2 | 50.00% |
| Duffy0831 vs Victor | 4–0 | 100.00% |
| Duffy0831 vs Miary Zo | 2–2 | 50.00% |
| Duffy0831 vs Yoshimitsu | 3–0 | 100.00% |
| Duffy0831 vs Kazuya | 3–0 | 100.00% |
| Duffy0831 vs Feng | 1–2 | 33.33% |
| Duffy0831 vs Nina | 2–0 | 100.00% |
| Duffy0831 vs Lee | 2–0 | 100.00% |
| Duffy0831 vs Leroy | 2–0 | 100.00% |
| Duffy0831 vs Jun | 2–0 | 100.00% |
| Duffy0831 vs Raven | 2–0 | 100.00% |
| Duffy0831 vs Anna | 2–0 | 100.00% |
| Duffy0831 vs Paul | 1–0 | 100.00% |
| Duffy0831 vs Zafina | 1–0 | 100.00% |
| Duffy0831 vs Eddy | 1–0 | 100.00% |
| Duffy0831 vs Armor King | 1–0 | 100.00% |
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.