| Sephiroth vs Reina | 31–16 | 65.96% |
| Sephiroth vs Kazuya | 18–16 | 52.94% |
| Sephiroth vs King | 17–15 | 53.12% |
| Sephiroth vs Jin | 9–22 | 29.03% |
| Sephiroth vs Hwoarang | 5–17 | 22.73% |
| Sephiroth vs Dragunov | 6–13 | 31.58% |
| Sephiroth vs Bryan | 9–4 | 69.23% |
| Sephiroth vs Clive | 3–10 | 23.08% |
| Sephiroth vs Heihachi | 1–11 | 8.33% |
| Sephiroth vs Xiaoyu | 4–7 | 36.36% |
| Sephiroth vs Lars | 4–7 | 36.36% |
| Sephiroth vs Jun | 5–5 | 50.00% |
| Sephiroth vs Feng | 3–6 | 33.33% |
| Sephiroth vs Alisa | 3–5 | 37.50% |
| Sephiroth vs Nina | 0–8 | 0.00% |
| Sephiroth vs Asuka | 2–5 | 28.57% |
| Sephiroth vs Victor | 2–5 | 28.57% |
| Sephiroth vs Paul | 0–6 | 0.00% |
| Sephiroth vs Devil Jin | 4–2 | 66.67% |
| Sephiroth vs Lili | 2–4 | 33.33% |
| Sephiroth vs Leroy | 0–6 | 0.00% |
| Sephiroth vs Law | 1–4 | 20.00% |
| Sephiroth vs Jack-8 | 2–3 | 40.00% |
| Sephiroth vs Lidia | 2–3 | 40.00% |
| Sephiroth vs Steve | 1–3 | 25.00% |
| Sephiroth vs Leo | 2–2 | 50.00% |
| Sephiroth vs Raven | 2–2 | 50.00% |
| Sephiroth vs Lee | 1–2 | 33.33% |
| Sephiroth vs Eddy | 2–1 | 66.67% |
| Sephiroth vs Shaheen | 2–0 | 100.00% |
| Sephiroth vs Kuma | 0–2 | 0.00% |
| Sephiroth vs Yoshimitsu | 1–0 | 100.00% |
| Sephiroth vs Claudio | 1–0 | 100.00% |
| Sephiroth vs Azucena | 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.