| Zephkial vs Reina | 32–27 | 54.24% |
| Zephkial vs King | 28–30 | 48.28% |
| Zephkial vs Jin | 16–18 | 47.06% |
| Zephkial vs Steve | 12–16 | 42.86% |
| Zephkial vs Hwoarang | 12–14 | 46.15% |
| Zephkial vs Kazuya | 12–12 | 50.00% |
| Zephkial vs Victor | 12–12 | 50.00% |
| Zephkial vs Bryan | 7–12 | 36.84% |
| Zephkial vs Dragunov | 2–15 | 11.76% |
| Zephkial vs Law | 6–9 | 40.00% |
| Zephkial vs Eddy | 5–10 | 33.33% |
| Zephkial vs Leo | 6–8 | 42.86% |
| Zephkial vs Lili | 3–10 | 23.08% |
| Zephkial vs Azucena | 4–9 | 30.77% |
| Zephkial vs Kuma | 4–8 | 33.33% |
| Zephkial vs Asuka | 6–5 | 54.55% |
| Zephkial vs Yoshimitsu | 6–4 | 60.00% |
| Zephkial vs Jack-8 | 1–8 | 11.11% |
| Zephkial vs Shaheen | 5–4 | 55.56% |
| Zephkial vs Lars | 4–4 | 50.00% |
| Zephkial vs Alisa | 2–6 | 25.00% |
| Zephkial vs Lee | 2–6 | 25.00% |
| Zephkial vs Leroy | 3–5 | 37.50% |
| Zephkial vs Xiaoyu | 6–1 | 85.71% |
| Zephkial vs Jun | 3–4 | 42.86% |
| Zephkial vs Feng | 6–0 | 100.00% |
| Zephkial vs Nina | 5–1 | 83.33% |
| Zephkial vs Panda | 3–3 | 50.00% |
| Zephkial vs Zafina | 3–2 | 60.00% |
| Zephkial vs Paul | 1–3 | 25.00% |
| Zephkial vs Claudio | 1–2 | 33.33% |
| Zephkial vs Devil Jin | 3–0 | 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.