| Mariusz vs Kazuya | 7–5 | 58.33% |
| Mariusz vs Lidia | 6–6 | 50.00% |
| Mariusz vs Hwoarang | 4–6 | 40.00% |
| Mariusz vs Reina | 7–1 | 87.50% |
| Mariusz vs Jin | 5–2 | 71.43% |
| Mariusz vs King | 4–2 | 66.67% |
| Mariusz vs Asuka | 2–3 | 40.00% |
| Mariusz vs Victor | 1–4 | 20.00% |
| Mariusz vs Eddy | 1–4 | 20.00% |
| Mariusz vs Heihachi | 4–1 | 80.00% |
| Mariusz vs Steve | 3–1 | 75.00% |
| Mariusz vs Alisa | 2–2 | 50.00% |
| Mariusz vs Nina | 3–1 | 75.00% |
| Mariusz vs Leroy | 2–2 | 50.00% |
| Mariusz vs Yoshimitsu | 2–1 | 66.67% |
| Mariusz vs Xiaoyu | 1–2 | 33.33% |
| Mariusz vs Jack-8 | 1–2 | 33.33% |
| Mariusz vs Lili | 3–0 | 100.00% |
| Mariusz vs Lars | 0–3 | 0.00% |
| Mariusz vs Paul | 2–0 | 100.00% |
| Mariusz vs Bryan | 2–0 | 100.00% |
| Mariusz vs Feng | 1–1 | 50.00% |
| Mariusz vs Dragunov | 0–2 | 0.00% |
| Mariusz vs Leo | 2–0 | 100.00% |
| Mariusz vs Lee | 2–0 | 100.00% |
| Mariusz vs Kuma | 0–2 | 0.00% |
| Mariusz vs Raven | 1–1 | 50.00% |
| Mariusz vs Law | 1–0 | 100.00% |
| Mariusz vs Azucena | 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.