| Zefro vs Kazuya | 17–21 | 44.74% |
| Zefro vs Hwoarang | 14–8 | 63.64% |
| Zefro vs Armor King | 13–8 | 61.90% |
| Zefro vs King | 13–6 | 68.42% |
| Zefro vs Jin | 10–6 | 62.50% |
| Zefro vs Steve | 11–3 | 78.57% |
| Zefro vs Law | 9–4 | 69.23% |
| Zefro vs Dragunov | 5–7 | 41.67% |
| Zefro vs Lars | 5–7 | 41.67% |
| Zefro vs Heihachi | 8–3 | 72.73% |
| Zefro vs Bryan | 3–7 | 30.00% |
| Zefro vs Devil Jin | 7–2 | 77.78% |
| Zefro vs Claudio | 7–1 | 87.50% |
| Zefro vs Asuka | 3–3 | 50.00% |
| Zefro vs Anna | 3–3 | 50.00% |
| Zefro vs Jack-8 | 2–3 | 40.00% |
| Zefro vs Feng | 2–3 | 40.00% |
| Zefro vs Lili | 4–1 | 80.00% |
| Zefro vs Shaheen | 3–2 | 60.00% |
| Zefro vs Eddy | 2–3 | 40.00% |
| Zefro vs Lidia | 4–1 | 80.00% |
| Zefro vs Yoshimitsu | 2–2 | 50.00% |
| Zefro vs Alisa | 4–0 | 100.00% |
| Zefro vs Miary Zo | 4–0 | 100.00% |
| Zefro vs Xiaoyu | 1–2 | 33.33% |
| Zefro vs Zafina | 2–1 | 66.67% |
| Zefro vs Jun | 1–2 | 33.33% |
| Zefro vs Reina | 1–2 | 33.33% |
| Zefro vs Azucena | 2–1 | 66.67% |
| Zefro vs Victor | 1–2 | 33.33% |
| Zefro vs Clive | 3–0 | 100.00% |
| Zefro vs Fahkumram | 2–1 | 66.67% |
| Zefro vs Paul | 2–0 | 100.00% |
| Zefro vs Lee | 2–0 | 100.00% |
| Zefro vs Kuma | 2–0 | 100.00% |
| Zefro 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.