| JustMashin vs Jin | 14–5 | 73.68% |
| JustMashin vs Eddy | 13–5 | 72.22% |
| JustMashin vs Kazuya | 10–5 | 66.67% |
| JustMashin vs Steve | 9–4 | 69.23% |
| JustMashin vs Reina | 7–6 | 53.85% |
| JustMashin vs Dragunov | 8–4 | 66.67% |
| JustMashin vs Xiaoyu | 9–1 | 90.00% |
| JustMashin vs Jack-8 | 8–2 | 80.00% |
| JustMashin vs Law | 5–4 | 55.56% |
| JustMashin vs King | 4–5 | 44.44% |
| JustMashin vs Bryan | 8–1 | 88.89% |
| JustMashin vs Lili | 4–5 | 44.44% |
| JustMashin vs Raven | 6–2 | 75.00% |
| JustMashin vs Paul | 4–3 | 57.14% |
| JustMashin vs Hwoarang | 5–2 | 71.43% |
| JustMashin vs Jun | 5–2 | 71.43% |
| JustMashin vs Yoshimitsu | 4–2 | 66.67% |
| JustMashin vs Nina | 4–2 | 66.67% |
| JustMashin vs Azucena | 4–1 | 80.00% |
| JustMashin vs Leo | 4–0 | 100.00% |
| JustMashin vs Lars | 1–2 | 33.33% |
| JustMashin vs Lee | 1–2 | 33.33% |
| JustMashin vs Leroy | 3–0 | 100.00% |
| JustMashin vs Victor | 2–1 | 66.67% |
| JustMashin vs Devil Jin | 2–0 | 100.00% |
| JustMashin vs Feng | 2–0 | 100.00% |
| JustMashin vs Asuka | 0–1 | 0.00% |
| JustMashin vs Kuma | 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.