| Mastorm vs Jin | 13–16 | 44.83% |
| Mastorm vs Kazuya | 9–10 | 47.37% |
| Mastorm vs Hwoarang | 7–11 | 38.89% |
| Mastorm vs King | 5–10 | 33.33% |
| Mastorm vs Reina | 7–8 | 46.67% |
| Mastorm vs Eddy | 7–7 | 50.00% |
| Mastorm vs Law | 5–7 | 41.67% |
| Mastorm vs Steve | 7–4 | 63.64% |
| Mastorm vs Paul | 2–7 | 22.22% |
| Mastorm vs Asuka | 3–6 | 33.33% |
| Mastorm vs Jun | 5–4 | 55.56% |
| Mastorm vs Bryan | 2–6 | 25.00% |
| Mastorm vs Lars | 6–2 | 75.00% |
| Mastorm vs Alisa | 1–7 | 12.50% |
| Mastorm vs Xiaoyu | 3–4 | 42.86% |
| Mastorm vs Jack-8 | 1–6 | 14.29% |
| Mastorm vs Leo | 1–6 | 14.29% |
| Mastorm vs Azucena | 4–3 | 57.14% |
| Mastorm vs Leroy | 4–2 | 66.67% |
| Mastorm vs Yoshimitsu | 2–3 | 40.00% |
| Mastorm vs Feng | 1–4 | 20.00% |
| Mastorm vs Lee | 2–3 | 40.00% |
| Mastorm vs Nina | 4–0 | 100.00% |
| Mastorm vs Victor | 1–3 | 25.00% |
| Mastorm vs Devil Jin | 2–1 | 66.67% |
| Mastorm vs Dragunov | 1–2 | 33.33% |
| Mastorm vs Kuma | 2–0 | 100.00% |
| Mastorm vs Lili | 1–0 | 100.00% |
| Mastorm vs Panda | 1–0 | 100.00% |
| Mastorm vs Zafina | 0–1 | 0.00% |
| Mastorm vs Raven | 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.