| Jamma vs Yoshimitsu | 8–9 | 47.06% |
| Jamma vs Jin | 6–5 | 54.55% |
| Jamma vs Clive | 5–5 | 50.00% |
| Jamma vs Hwoarang | 6–3 | 66.67% |
| Jamma vs Steve | 2–6 | 25.00% |
| Jamma vs Lili | 1–6 | 14.29% |
| Jamma vs Reina | 4–3 | 57.14% |
| Jamma vs Victor | 5–2 | 71.43% |
| Jamma vs Leroy | 3–3 | 50.00% |
| Jamma vs Lars | 2–3 | 40.00% |
| Jamma vs Lidia | 2–2 | 50.00% |
| Jamma vs Heihachi | 1–3 | 25.00% |
| Jamma vs Paul | 1–2 | 33.33% |
| Jamma vs Dragunov | 1–2 | 33.33% |
| Jamma vs Jun | 3–0 | 100.00% |
| Jamma vs Azucena | 0–3 | 0.00% |
| Jamma vs King | 1–1 | 50.00% |
| Jamma vs Xiaoyu | 2–0 | 100.00% |
| Jamma vs Asuka | 1–1 | 50.00% |
| Jamma vs Alisa | 2–0 | 100.00% |
| Jamma vs Claudio | 2–0 | 100.00% |
| Jamma vs Nina | 0–2 | 0.00% |
| Jamma vs Kuma | 0–2 | 0.00% |
| Jamma vs Law | 0–1 | 0.00% |
| Jamma vs Bryan | 0–1 | 0.00% |
| Jamma vs Devil Jin | 0–1 | 0.00% |
| Jamma vs Leo | 0–1 | 0.00% |
| Jamma vs Shaheen | 1–0 | 100.00% |
| Jamma vs Eddy | 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.