| Zefirion vs King | 17–22 | 43.59% |
| Zefirion vs Steve | 10–19 | 34.48% |
| Zefirion vs Kazuya | 8–20 | 28.57% |
| Zefirion vs Jin | 12–14 | 46.15% |
| Zefirion vs Reina | 16–10 | 61.54% |
| Zefirion vs Eddy | 6–10 | 37.50% |
| Zefirion vs Hwoarang | 7–8 | 46.67% |
| Zefirion vs Heihachi | 6–9 | 40.00% |
| Zefirion vs Law | 6–7 | 46.15% |
| Zefirion vs Dragunov | 7–5 | 58.33% |
| Zefirion vs Jun | 7–5 | 58.33% |
| Zefirion vs Yoshimitsu | 6–5 | 54.55% |
| Zefirion vs Bryan | 3–8 | 27.27% |
| Zefirion vs Nina | 7–4 | 63.64% |
| Zefirion vs Fahkumram | 7–4 | 63.64% |
| Zefirion vs Azucena | 5–5 | 50.00% |
| Zefirion vs Asuka | 4–5 | 44.44% |
| 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 Clive | 5–2 | 71.43% |
| Zefirion vs Feng | 4–2 | 66.67% |
| Zefirion vs Lili | 2–4 | 33.33% |
| Zefirion vs Paul | 2–3 | 40.00% |
| Zefirion vs Leo | 2–3 | 40.00% |
| Zefirion vs Lidia | 1–4 | 20.00% |
| Zefirion vs Claudio | 0–4 | 0.00% |
| Zefirion vs Alisa | 2–1 | 66.67% |
| Zefirion vs Kuma | 2–1 | 66.67% |
| Zefirion vs Raven | 1–2 | 33.33% |
| Zefirion vs Devil Jin | 2–0 | 100.00% |
| Zefirion vs Zafina | 2–0 | 100.00% |
| Zefirion vs Anna | 2–0 | 100.00% |
| Zefirion vs Shaheen | 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.