| Zefirion vs Reina | 16–10 | 61.54% |
| Zefirion vs Kazuya | 7–14 | 33.33% |
| Zefirion vs Jin | 12–7 | 63.16% |
| Zefirion vs King | 9–8 | 52.94% |
| Zefirion vs Steve | 6–10 | 37.50% |
| Zefirion vs Eddy | 6–10 | 37.50% |
| Zefirion vs Hwoarang | 5–7 | 41.67% |
| Zefirion vs Nina | 7–4 | 63.64% |
| Zefirion vs Fahkumram | 7–4 | 63.64% |
| Zefirion vs Law | 5–5 | 50.00% |
| Zefirion vs Yoshimitsu | 6–4 | 60.00% |
| Zefirion vs Bryan | 2–6 | 25.00% |
| Zefirion vs Jun | 6–2 | 75.00% |
| Zefirion vs Azucena | 5–3 | 62.50% |
| Zefirion vs Victor | 3–5 | 37.50% |
| Zefirion vs Miary Zo | 7–1 | 87.50% |
| Zefirion vs Jack-8 | 1–6 | 14.29% |
| Zefirion vs Leroy | 1–6 | 14.29% |
| Zefirion vs Heihachi | 3–4 | 42.86% |
| Zefirion vs Paul | 2–3 | 40.00% |
| Zefirion vs Asuka | 4–1 | 80.00% |
| Zefirion vs Lidia | 1–4 | 20.00% |
| Zefirion vs Clive | 4–1 | 80.00% |
| Zefirion vs Feng | 2–2 | 50.00% |
| Zefirion vs Lili | 1–3 | 25.00% |
| Zefirion vs Dragunov | 2–2 | 50.00% |
| Zefirion vs Claudio | 0–4 | 0.00% |
| Zefirion vs Raven | 1–2 | 33.33% |
| Zefirion vs Leo | 0–2 | 0.00% |
| Zefirion vs Zafina | 2–0 | 100.00% |
| Zefirion vs Anna | 2–0 | 100.00% |
| Zefirion vs Alisa | 0–1 | 0.00% |
| Zefirion vs Shaheen | 1–0 | 100.00% |
| Zefirion vs Kuma | 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.