| Sephiroth vs Jin | 47–38 | 55.29% |
| Sephiroth vs Clive | 41–32 | 56.16% |
| Sephiroth vs Kazuya | 36–36 | 50.00% |
| Sephiroth vs Steve | 45–26 | 63.38% |
| Sephiroth vs King | 30–32 | 48.39% |
| Sephiroth vs Hwoarang | 35–25 | 58.33% |
| Sephiroth vs Reina | 40–20 | 66.67% |
| Sephiroth vs Bryan | 29–28 | 50.88% |
| Sephiroth vs Dragunov | 21–23 | 47.73% |
| Sephiroth vs Law | 13–23 | 36.11% |
| Sephiroth vs Heihachi | 16–20 | 44.44% |
| Sephiroth vs Devil Jin | 16–17 | 48.48% |
| Sephiroth vs Asuka | 18–12–1 | 60.00% |
| Sephiroth vs Victor | 15–15 | 50.00% |
| Sephiroth vs Azucena | 12–16 | 42.86% |
| Sephiroth vs Nina | 16–9 | 64.00% |
| Sephiroth vs Eddy | 15–9 | 62.50% |
| Sephiroth vs Lars | 11–11 | 50.00% |
| Sephiroth vs Lili | 15–6 | 71.43% |
| Sephiroth vs Armor King | 7–14 | 33.33% |
| Sephiroth vs Paul | 9–11 | 45.00% |
| Sephiroth vs Feng | 15–5 | 75.00% |
| Sephiroth vs Lee | 11–7 | 61.11% |
| Sephiroth vs Leo | 10–5 | 66.67% |
| Sephiroth vs Claudio | 7–8 | 46.67% |
| Sephiroth vs Lidia | 9–6 | 60.00% |
| Sephiroth vs Alisa | 4–9 | 30.77% |
| Sephiroth vs Leroy | 8–5 | 61.54% |
| Sephiroth vs Zafina | 7–4 | 63.64% |
| Sephiroth vs Yoshimitsu | 3–6 | 33.33% |
| Sephiroth vs Miary Zo | 6–3 | 66.67% |
| Sephiroth vs Xiaoyu | 5–3 | 62.50% |
| Sephiroth vs Jun | 2–6 | 25.00% |
| Sephiroth vs Jack-8 | 2–3 | 40.00% |
| Sephiroth vs Shaheen | 3–2 | 60.00% |
| Sephiroth vs Panda | 3–2 | 60.00% |
| Sephiroth vs Raven | 2–3 | 40.00% |
| Sephiroth vs Kuma | 1–2 | 33.33% |
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.