| Mastu vs Jin | 11–18 | 37.93% |
| Mastu vs Kazuya | 9–17 | 34.62% |
| Mastu vs King | 13–11 | 54.17% |
| Mastu vs Reina | 12–12 | 50.00% |
| Mastu vs Hwoarang | 6–16 | 27.27% |
| Mastu vs Asuka | 9–8 | 52.94% |
| Mastu vs Dragunov | 9–7 | 56.25% |
| Mastu vs Bryan | 7–7 | 50.00% |
| Mastu vs Law | 5–7 | 41.67% |
| Mastu vs Steve | 7–5 | 58.33% |
| Mastu vs Feng | 4–8 | 33.33% |
| Mastu vs Paul | 3–8 | 27.27% |
| Mastu vs Lili | 4–6 | 40.00% |
| Mastu vs Kuma | 4–6 | 40.00% |
| Mastu vs Victor | 5–5 | 50.00% |
| Mastu vs Eddy | 1–9 | 10.00% |
| Mastu vs Jack-8 | 3–6 | 33.33% |
| Mastu vs Xiaoyu | 4–4 | 50.00% |
| Mastu vs Lars | 0–8 | 0.00% |
| Mastu vs Jun | 3–5 | 37.50% |
| Mastu vs Leo | 6–1 | 85.71% |
| Mastu vs Alisa | 3–4 | 42.86% |
| Mastu vs Nina | 2–5 | 28.57% |
| Mastu vs Yoshimitsu | 4–2 | 66.67% |
| Mastu vs Shaheen | 3–3 | 50.00% |
| Mastu vs Azucena | 2–4 | 33.33% |
| Mastu vs Raven | 2–4 | 33.33% |
| Mastu vs Devil Jin | 2–3 | 40.00% |
| Mastu vs Claudio | 2–1 | 66.67% |
| Mastu vs Lee | 0–2 | 0.00% |
| Mastu vs Zafina | 0–2 | 0.00% |
| Mastu vs Leroy | 2–0 | 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.