| Mostafa vs Jin | 6–19 | 24.00% |
| Mostafa vs Steve | 5–11 | 31.25% |
| Mostafa vs Jun | 4–9 | 30.77% |
| Mostafa vs Law | 3–8 | 27.27% |
| Mostafa vs King | 3–8 | 27.27% |
| Mostafa vs Kazuya | 6–4 | 60.00% |
| Mostafa vs Dragunov | 3–6 | 33.33% |
| Mostafa vs Reina | 3–4 | 42.86% |
| Mostafa vs Clive | 5–2 | 71.43% |
| Mostafa vs Lars | 1–5 | 16.67% |
| Mostafa vs Claudio | 3–2 | 60.00% |
| Mostafa vs Leroy | 1–4 | 20.00% |
| Mostafa vs Hwoarang | 1–3 | 25.00% |
| Mostafa vs Asuka | 0–4 | 0.00% |
| Mostafa vs Lili | 3–1 | 75.00% |
| Mostafa vs Zafina | 3–1 | 75.00% |
| Mostafa vs Jack-8 | 0–3 | 0.00% |
| Mostafa vs Victor | 1–2 | 33.33% |
| Mostafa vs Paul | 2–0 | 100.00% |
| Mostafa vs Yoshimitsu | 1–1 | 50.00% |
| Mostafa vs Bryan | 1–1 | 50.00% |
| Mostafa vs Feng | 0–2 | 0.00% |
| Mostafa vs Azucena | 2–0 | 100.00% |
| Mostafa vs Eddy | 1–1 | 50.00% |
| Mostafa vs Xiaoyu | 0–1 | 0.00% |
| Mostafa vs Leo | 0–1 | 0.00% |
| Mostafa vs Raven | 0–1 | 0.00% |
| Mostafa vs Lidia | 1–0 | 100.00% |
| Mostafa vs Anna | 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.