| Diffen vs Kazuya | 11–12 | 47.83% |
| Diffen vs King | 6–16 | 27.27% |
| Diffen vs Yoshimitsu | 4–17 | 19.05% |
| Diffen vs Lili | 3–18 | 14.29% |
| Diffen vs Lidia | 6–13 | 31.58% |
| Diffen vs Jin | 10–7 | 58.82% |
| Diffen vs Reina | 1–15 | 6.25% |
| Diffen vs Law | 5–10 | 33.33% |
| Diffen vs Victor | 3–11 | 21.43% |
| Diffen vs Alisa | 4–9 | 30.77% |
| Diffen vs Leroy | 3–10 | 23.08% |
| Diffen vs Clive | 5–7 | 41.67% |
| Diffen vs Paul | 1–10 | 9.09% |
| Diffen vs Nina | 7–4 | 63.64% |
| Diffen vs Jun | 1–10 | 9.09% |
| Diffen vs Hwoarang | 0–10 | 0.00% |
| Diffen vs Devil Jin | 4–6 | 40.00% |
| Diffen vs Feng | 4–5 | 44.44% |
| Diffen vs Lars | 2–7 | 22.22% |
| Diffen vs Xiaoyu | 1–7 | 12.50% |
| Diffen vs Azucena | 5–3 | 62.50% |
| Diffen vs Heihachi | 1–7 | 12.50% |
| Diffen vs Bryan | 2–5 | 28.57% |
| Diffen vs Eddy | 1–5 | 16.67% |
| Diffen vs Jack-8 | 1–4 | 20.00% |
| Diffen vs Claudio | 1–3 | 25.00% |
| Diffen vs Zafina | 4–0 | 100.00% |
| Diffen vs Asuka | 1–2 | 33.33% |
| Diffen vs Dragunov | 0–3 | 0.00% |
| Diffen vs Lee | 0–2 | 0.00% |
| Diffen vs Shaheen | 1–0 | 100.00% |
| Diffen vs Kuma | 0–1 | 0.00% |
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.