| Joelossal vs Jin | 4–8 | 33.33% |
| Joelossal vs King | 3–8 | 27.27% |
| Joelossal vs Law | 2–8 | 20.00% |
| Joelossal vs Yoshimitsu | 8–2 | 80.00% |
| Joelossal vs Steve | 2–6 | 25.00% |
| Joelossal vs Alisa | 3–2 | 60.00% |
| Joelossal vs Hwoarang | 2–2 | 50.00% |
| Joelossal vs Eddy | 0–4 | 0.00% |
| Joelossal vs Lili | 1–2 | 33.33% |
| Joelossal vs Lars | 0–3 | 0.00% |
| Joelossal vs Xiaoyu | 0–2 | 0.00% |
| Joelossal vs Kazuya | 0–2 | 0.00% |
| Joelossal vs Feng | 0–2 | 0.00% |
| Joelossal vs Dragunov | 0–2 | 0.00% |
| Joelossal vs Shaheen | 0–2 | 0.00% |
| Joelossal vs Jun | 0–2 | 0.00% |
| Joelossal vs Reina | 1–1 | 50.00% |
| Joelossal vs Victor | 0–2 | 0.00% |
| Joelossal vs Paul | 0–1 | 0.00% |
| Joelossal vs Asuka | 0–1 | 0.00% |
| Joelossal vs Devil Jin | 1–0 | 100.00% |
| Joelossal vs Claudio | 0–1 | 0.00% |
| Joelossal vs Zafina | 0–1 | 0.00% |
| Joelossal vs Leroy | 0–1 | 0.00% |
| Joelossal vs Azucena | 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.