| Zeffia vs Steve | 6–8 | 42.86% |
| Zeffia vs Bryan | 0–12 | 0.00% |
| Zeffia vs Lars | 6–3 | 66.67% |
| Zeffia vs Nina | 6–3 | 66.67% |
| Zeffia vs Dragunov | 3–5 | 37.50% |
| Zeffia vs Clive | 0–8 | 0.00% |
| Zeffia vs Reina | 3–4 | 42.86% |
| Zeffia vs Paul | 3–3 | 50.00% |
| Zeffia vs Asuka | 1–5 | 16.67% |
| Zeffia vs Jin | 2–3 | 40.00% |
| Zeffia vs Kazuya | 1–4 | 20.00% |
| Zeffia vs King | 2–2 | 50.00% |
| Zeffia vs Claudio | 2–2 | 50.00% |
| Zeffia vs Lili | 1–2 | 33.33% |
| Zeffia vs Alisa | 2–1 | 66.67% |
| Zeffia vs Law | 0–2 | 0.00% |
| Zeffia vs Xiaoyu | 0–2 | 0.00% |
| Zeffia vs Devil Jin | 0–2 | 0.00% |
| Zeffia vs Feng | 0–2 | 0.00% |
| Zeffia vs Zafina | 0–2 | 0.00% |
| Zeffia vs Jun | 0–2 | 0.00% |
| Zeffia vs Eddy | 0–2 | 0.00% |
| Zeffia vs Heihachi | 2–0 | 100.00% |
| Zeffia vs Shaheen | 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.