| Mattopotamus vs Steve | 22–38 | 36.67% |
| Mattopotamus vs Jin | 27–30 | 47.37% |
| Mattopotamus vs Hwoarang | 8–41 | 16.33% |
| Mattopotamus vs King | 17–27 | 38.64% |
| Mattopotamus vs Lili | 12–30 | 28.57% |
| Mattopotamus vs Dragunov | 15–22 | 40.54% |
| Mattopotamus vs Armor King | 9–27 | 25.00% |
| Mattopotamus vs Law | 13–20 | 39.39% |
| Mattopotamus vs Kazuya | 11–20 | 35.48% |
| Mattopotamus vs Reina | 9–21 | 30.00% |
| Mattopotamus vs Azucena | 7–23 | 23.33% |
| Mattopotamus vs Bryan | 7–17 | 29.17% |
| Mattopotamus vs Miary Zo | 4–17 | 19.05% |
| Mattopotamus vs Lars | 4–16 | 20.00% |
| Mattopotamus vs Jun | 4–16 | 20.00% |
| Mattopotamus vs Nina | 8–11 | 42.11% |
| Mattopotamus vs Victor | 3–15 | 16.67% |
| Mattopotamus vs Eddy | 3–15 | 16.67% |
| Mattopotamus vs Clive | 9–9 | 50.00% |
| Mattopotamus vs Fahkumram | 5–12 | 29.41% |
| Mattopotamus vs Anna | 6–10 | 37.50% |
| Mattopotamus vs Yoshimitsu | 4–11 | 26.67% |
| Mattopotamus vs Paul | 3–11 | 21.43% |
| Mattopotamus vs Devil Jin | 5–7 | 41.67% |
| Mattopotamus vs Panda | 2–8 | 20.00% |
| Mattopotamus vs Leo | 5–4 | 55.56% |
| Mattopotamus vs Claudio | 2–7 | 22.22% |
| Mattopotamus vs Alisa | 2–6 | 25.00% |
| Mattopotamus vs Lee | 2–6 | 25.00% |
| Mattopotamus vs Leroy | 4–4 | 50.00% |
| Mattopotamus vs Shaheen | 2–5 | 28.57% |
| Mattopotamus vs Raven | 4–3 | 57.14% |
| Mattopotamus vs Lidia | 1–6 | 14.29% |
| Mattopotamus vs Asuka | 1–4 | 20.00% |
| Mattopotamus vs Feng | 1–3 | 25.00% |
| Mattopotamus vs Xiaoyu | 0–3 | 0.00% |
| Mattopotamus vs Zafina | 1–2 | 33.33% |
| Mattopotamus vs Kuma | 0–2 | 0.00% |
| Mattopotamus vs Heihachi | 2–0 | 100.00% |
| Mattopotamus vs Jack-8 | 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.