| Mastram vs King | 20–19 | 51.28% |
| Mastram vs Law | 16–10 | 61.54% |
| Mastram vs Bryan | 13–9 | 59.09% |
| Mastram vs Nina | 16–4 | 80.00% |
| Mastram vs Paul | 12–7 | 63.16% |
| Mastram vs Armor King | 4–11 | 26.67% |
| Mastram vs Jin | 11–3 | 78.57% |
| Mastram vs Victor | 3–10 | 23.08% |
| Mastram vs Yoshimitsu | 11–1 | 91.67% |
| Mastram vs Steve | 4–7 | 36.36% |
| Mastram vs Reina | 7–1 | 87.50% |
| Mastram vs Kazuya | 6–1 | 85.71% |
| Mastram vs Leo | 2–5 | 28.57% |
| Mastram vs Eddy | 4–3 | 57.14% |
| Mastram vs Hwoarang | 3–3 | 50.00% |
| Mastram vs Devil Jin | 4–2 | 66.67% |
| Mastram vs Azucena | 1–5 | 16.67% |
| Mastram vs Anna | 2–4 | 33.33% |
| Mastram vs Feng | 3–2 | 60.00% |
| Mastram vs Lili | 2–3 | 40.00% |
| Mastram vs Dragunov | 4–1 | 80.00% |
| Mastram vs Fahkumram | 2–3 | 40.00% |
| Mastram vs Xiaoyu | 4–0 | 100.00% |
| Mastram vs Asuka | 4–0 | 100.00% |
| Mastram vs Alisa | 0–4 | 0.00% |
| Mastram vs Kuma | 2–2 | 50.00% |
| Mastram vs Claudio | 2–1 | 66.67% |
| Mastram vs Jun | 0–3 | 0.00% |
| Mastram vs Leroy | 1–1 | 50.00% |
| Mastram vs Heihachi | 0–2 | 0.00% |
| Mastram vs Lars | 0–1 | 0.00% |
| Mastram vs Lee | 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.