| Mastahi vs Kazuya | 51–42 | 54.84% |
| Mastahi vs Reina | 42–23 | 64.62% |
| Mastahi vs Bryan | 33–20 | 62.26% |
| Mastahi vs Jin | 31–21 | 59.62% |
| Mastahi vs Clive | 24–19 | 55.81% |
| Mastahi vs Heihachi | 22–20 | 52.38% |
| Mastahi vs Steve | 26–14 | 65.00% |
| Mastahi vs Lee | 23–15 | 60.53% |
| Mastahi vs King | 21–16 | 56.76% |
| Mastahi vs Devil Jin | 20–17 | 54.05% |
| Mastahi vs Hwoarang | 19–16 | 54.29% |
| Mastahi vs Dragunov | 19–12 | 61.29% |
| Mastahi vs Yoshimitsu | 18–10 | 64.29% |
| Mastahi vs Feng | 12–16 | 42.86% |
| Mastahi vs Nina | 11–17 | 39.29% |
| Mastahi vs Miary Zo | 18–10 | 64.29% |
| Mastahi vs Paul | 16–10 | 61.54% |
| Mastahi vs Azucena | 15–11 | 57.69% |
| Mastahi vs Asuka | 10–15 | 40.00% |
| Mastahi vs Law | 15–7 | 68.18% |
| Mastahi vs Jun | 11–8 | 57.89% |
| Mastahi vs Lili | 12–6 | 66.67% |
| Mastahi vs Leroy | 10–7 | 58.82% |
| Mastahi vs Eddy | 8–8 | 50.00% |
| Mastahi vs Shaheen | 6–6 | 50.00% |
| Mastahi vs Fahkumram | 4–8 | 33.33% |
| Mastahi vs Leo | 4–6 | 40.00% |
| Mastahi vs Raven | 4–6 | 40.00% |
| Mastahi vs Anna | 4–6 | 40.00% |
| Mastahi vs Xiaoyu | 7–2 | 77.78% |
| Mastahi vs Alisa | 4–5 | 44.44% |
| Mastahi vs Victor | 3–6 | 33.33% |
| Mastahi vs Armor King | 3–6 | 33.33% |
| Mastahi vs Kuma | 4–4 | 50.00% |
| Mastahi vs Zafina | 4–4 | 50.00% |
| Mastahi vs Lidia | 5–3 | 62.50% |
| Mastahi vs Lars | 4–2 | 66.67% |
| Mastahi vs Claudio | 1–4 | 20.00% |
| Mastahi vs Jack-8 | 0–4 | 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.