| Mastaru vs Reina | 12–8 | 60.00% |
| Mastaru vs King | 5–13 | 27.78% |
| Mastaru vs Kazuya | 4–14 | 22.22% |
| Mastaru vs Steve | 13–4 | 76.47% |
| Mastaru vs Jin | 4–11 | 26.67% |
| Mastaru vs Dragunov | 6–5 | 54.55% |
| Mastaru vs Paul | 3–4 | 42.86% |
| Mastaru vs Bryan | 4–3 | 57.14% |
| Mastaru vs Nina | 2–4 | 33.33% |
| Mastaru vs Leo | 2–3 | 40.00% |
| Mastaru vs Alisa | 5–0 | 100.00% |
| Mastaru vs Lee | 2–3 | 40.00% |
| Mastaru vs Kuma | 3–2 | 60.00% |
| Mastaru vs Azucena | 2–3 | 40.00% |
| Mastaru vs Law | 0–4 | 0.00% |
| Mastaru vs Hwoarang | 4–0 | 100.00% |
| Mastaru vs Xiaoyu | 2–2 | 50.00% |
| Mastaru vs Asuka | 4–0 | 100.00% |
| Mastaru vs Eddy | 2–2 | 50.00% |
| Mastaru vs Claudio | 0–3 | 0.00% |
| Mastaru vs Clive | 1–2 | 33.33% |
| Mastaru vs Anna | 1–2 | 33.33% |
| Mastaru vs Yoshimitsu | 2–0 | 100.00% |
| Mastaru vs Jack-8 | 0–2 | 0.00% |
| Mastaru vs Devil Jin | 0–2 | 0.00% |
| Mastaru vs Lili | 1–1 | 50.00% |
| Mastaru vs Lars | 0–2 | 0.00% |
| Mastaru vs Leroy | 2–0 | 100.00% |
| Mastaru vs Jun | 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.