| JamalJoestar vs Lidia | 11–8 | 57.89% |
| JamalJoestar vs Lili | 8–8 | 50.00% |
| JamalJoestar vs Law | 8–7 | 53.33% |
| JamalJoestar vs Steve | 8–4 | 66.67% |
| JamalJoestar vs King | 5–6 | 45.45% |
| JamalJoestar vs Jin | 6–5 | 54.55% |
| JamalJoestar vs Hwoarang | 6–4 | 60.00% |
| JamalJoestar vs Bryan | 1–8 | 11.11% |
| JamalJoestar vs Kazuya | 4–4 | 50.00% |
| JamalJoestar vs Jun | 5–3 | 62.50% |
| JamalJoestar vs Reina | 3–5 | 37.50% |
| JamalJoestar vs Yoshimitsu | 1–6 | 14.29% |
| JamalJoestar vs Asuka | 0–6 | 0.00% |
| JamalJoestar vs Paul | 4–1 | 80.00% |
| JamalJoestar vs Lars | 3–2 | 60.00% |
| JamalJoestar vs Victor | 2–3 | 40.00% |
| JamalJoestar vs Dragunov | 2–2 | 50.00% |
| JamalJoestar vs Eddy | 2–2 | 50.00% |
| JamalJoestar vs Xiaoyu | 1–2 | 33.33% |
| JamalJoestar vs Claudio | 2–1 | 66.67% |
| JamalJoestar vs Leroy | 1–2 | 33.33% |
| JamalJoestar vs Heihachi | 1–2 | 33.33% |
| JamalJoestar vs Jack-8 | 0–2 | 0.00% |
| JamalJoestar vs Feng | 0–2 | 0.00% |
| JamalJoestar vs Leo | 0–2 | 0.00% |
| JamalJoestar vs Shaheen | 0–2 | 0.00% |
| JamalJoestar vs Azucena | 0–2 | 0.00% |
| JamalJoestar vs Nina | 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.