| Mazennko vs Jin | 23–35 | 39.66% |
| Mazennko vs Kazuya | 26–21 | 55.32% |
| Mazennko vs King | 25–20 | 55.56% |
| Mazennko vs Hwoarang | 20–25 | 44.44% |
| Mazennko vs Yoshimitsu | 15–21 | 41.67% |
| Mazennko vs Law | 18–16 | 52.94% |
| Mazennko vs Bryan | 16–17 | 48.48% |
| Mazennko vs Eddy | 14–17 | 45.16% |
| Mazennko vs Reina | 9–21 | 30.00% |
| Mazennko vs Steve | 12–14 | 46.15% |
| Mazennko vs Victor | 10–15 | 40.00% |
| Mazennko vs Devil Jin | 17–7 | 70.83% |
| Mazennko vs Jun | 18–6 | 75.00% |
| Mazennko vs Feng | 11–11 | 50.00% |
| Mazennko vs Lili | 10–9 | 52.63% |
| Mazennko vs Dragunov | 6–12 | 33.33% |
| Mazennko vs Alisa | 11–7 | 61.11% |
| Mazennko vs Azucena | 10–8 | 55.56% |
| Mazennko vs Xiaoyu | 6–9 | 40.00% |
| Mazennko vs Asuka | 9–3 | 75.00% |
| Mazennko vs Kuma | 5–7 | 41.67% |
| Mazennko vs Zafina | 7–5 | 58.33% |
| Mazennko vs Jack-8 | 8–3 | 72.73% |
| Mazennko vs Lee | 5–6 | 45.45% |
| Mazennko vs Leroy | 2–9 | 18.18% |
| Mazennko vs Lars | 4–6 | 40.00% |
| Mazennko vs Nina | 6–4 | 60.00% |
| Mazennko vs Paul | 4–4 | 50.00% |
| Mazennko vs Claudio | 3–3 | 50.00% |
| Mazennko vs Panda | 3–3 | 50.00% |
| Mazennko vs Raven | 4–1 | 80.00% |
| Mazennko vs Shaheen | 1–2 | 33.33% |
| Mazennko vs Lidia | 0–2 | 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.