| Jeffetsama vs King | 12–9 | 57.14% |
| Jeffetsama vs Jin | 12–8 | 60.00% |
| Jeffetsama vs Steve | 12–7 | 63.16% |
| Jeffetsama vs Hwoarang | 10–8 | 55.56% |
| Jeffetsama vs Kazuya | 8–10 | 44.44% |
| Jeffetsama vs Law | 7–5 | 58.33% |
| Jeffetsama vs Jun | 8–4 | 66.67% |
| Jeffetsama vs Heihachi | 7–4 | 63.64% |
| Jeffetsama vs Dragunov | 4–6 | 40.00% |
| Jeffetsama vs Victor | 7–3 | 70.00% |
| Jeffetsama vs Nina | 2–7 | 22.22% |
| Jeffetsama vs Clive | 6–3 | 66.67% |
| Jeffetsama vs Xiaoyu | 5–2 | 71.43% |
| Jeffetsama vs Asuka | 4–3 | 57.14% |
| Jeffetsama vs Devil Jin | 4–3 | 57.14% |
| Jeffetsama vs Lili | 5–2 | 71.43% |
| Jeffetsama vs Lee | 5–2 | 71.43% |
| Jeffetsama vs Leroy | 7–0 | 100.00% |
| Jeffetsama vs Reina | 6–1 | 85.71% |
| Jeffetsama vs Eddy | 4–3 | 57.14% |
| Jeffetsama vs Jack-8 | 2–4 | 33.33% |
| Jeffetsama vs Azucena | 3–3 | 50.00% |
| Jeffetsama vs Lidia | 4–2 | 66.67% |
| Jeffetsama vs Paul | 2–3 | 40.00% |
| Jeffetsama vs Bryan | 1–4 | 20.00% |
| Jeffetsama vs Feng | 4–1 | 80.00% |
| Jeffetsama vs Yoshimitsu | 2–2 | 50.00% |
| Jeffetsama vs Shaheen | 0–4 | 0.00% |
| Jeffetsama vs Lars | 2–1 | 66.67% |
| Jeffetsama vs Panda | 1–2 | 33.33% |
| Jeffetsama vs Raven | 2–0 | 100.00% |
| Jeffetsama vs Anna | 2–0 | 100.00% |
| Jeffetsama vs Fahkumram | 2–0 | 100.00% |
| Jeffetsama vs Zafina | 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.