| Mamai vs Jin | 8–37 | 17.78% |
| Mamai vs King | 15–19 | 44.12% |
| Mamai vs Clive | 4–28 | 12.50% |
| Mamai vs Jun | 8–17 | 32.00% |
| Mamai vs Reina | 15–10 | 60.00% |
| Mamai vs Kazuya | 6–17–1 | 26.09% |
| Mamai vs Alisa | 5–17 | 22.73% |
| Mamai vs Law | 3–16 | 15.79% |
| Mamai vs Steve | 4–14 | 22.22% |
| Mamai vs Lili | 8–10 | 44.44% |
| Mamai vs Nina | 2–15 | 11.76% |
| Mamai vs Heihachi | 5–12 | 29.41% |
| Mamai vs Yoshimitsu | 6–9 | 40.00% |
| Mamai vs Lidia | 3–12 | 20.00% |
| Mamai vs Victor | 4–10 | 28.57% |
| Mamai vs Hwoarang | 2–11 | 15.38% |
| Mamai vs Bryan | 3–10 | 23.08% |
| Mamai vs Eddy | 3–10 | 23.08% |
| Mamai vs Dragunov | 4–8 | 33.33% |
| Mamai vs Xiaoyu | 2–9 | 18.18% |
| Mamai vs Asuka | 1–10 | 9.09% |
| Mamai vs Devil Jin | 2–9 | 18.18% |
| Mamai vs Leroy | 3–6 | 33.33% |
| Mamai vs Paul | 2–6 | 25.00% |
| Mamai vs Lars | 2–6 | 25.00% |
| Mamai vs Shaheen | 2–5 | 28.57% |
| Mamai vs Azucena | 5–2 | 71.43% |
| Mamai vs Raven | 3–3 | 50.00% |
| Mamai vs Leo | 1–4 | 20.00% |
| Mamai vs Lee | 2–2 | 50.00% |
| Mamai vs Jack-8 | 2–1 | 66.67% |
| Mamai vs Zafina | 2–1 | 66.67% |
| Mamai vs Feng | 0–2 | 0.00% |
| Mamai vs Claudio | 0–2 | 0.00% |
| Mamai vs Panda | 0–2 | 0.00% |
| Mamai 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.