| Jeffero vs Hwoarang | 13–4 | 76.47% |
| Jeffero vs Bryan | 9–6 | 60.00% |
| Jeffero vs King | 11–3 | 78.57% |
| Jeffero vs Jin | 6–5 | 54.55% |
| Jeffero vs Eddy | 6–1 | 85.71% |
| Jeffero vs Paul | 1–5 | 16.67% |
| Jeffero vs Kazuya | 3–3 | 50.00% |
| Jeffero vs Steve | 4–2 | 66.67% |
| Jeffero vs Asuka | 2–4 | 33.33% |
| Jeffero vs Dragunov | 5–1 | 83.33% |
| Jeffero vs Law | 4–1 | 80.00% |
| Jeffero vs Yoshimitsu | 1–4 | 20.00% |
| Jeffero vs Xiaoyu | 3–2 | 60.00% |
| Jeffero vs Lili | 5–0 | 100.00% |
| Jeffero vs Reina | 2–3 | 40.00% |
| Jeffero vs Heihachi | 3–2 | 60.00% |
| Jeffero vs Lars | 1–3 | 25.00% |
| Jeffero vs Jun | 4–0 | 100.00% |
| Jeffero vs Azucena | 1–3 | 25.00% |
| Jeffero vs Victor | 4–0 | 100.00% |
| Jeffero vs Alisa | 2–1 | 66.67% |
| Jeffero vs Leo | 1–1 | 50.00% |
| Jeffero vs Nina | 1–1 | 50.00% |
| Jeffero vs Lee | 1–1 | 50.00% |
| Jeffero vs Leroy | 1–1 | 50.00% |
| Jeffero vs Lidia | 1–1 | 50.00% |
| Jeffero vs Jack-8 | 0–1 | 0.00% |
| Jeffero vs Devil Jin | 0–1 | 0.00% |
| Jeffero vs Feng | 0–1 | 0.00% |
| Jeffero vs Zafina | 1–0 | 100.00% |
| Jeffero vs Raven | 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.