| Sephiroth vs Clive | 26–17 | 60.47% |
| Sephiroth vs Kazuya | 19–19 | 50.00% |
| Sephiroth vs Bryan | 15–18 | 45.45% |
| Sephiroth vs King | 21–10 | 67.74% |
| Sephiroth vs Jin | 16–12 | 57.14% |
| Sephiroth vs Reina | 19–8 | 70.37% |
| Sephiroth vs Heihachi | 15–10 | 60.00% |
| Sephiroth vs Hwoarang | 13–10 | 56.52% |
| Sephiroth vs Eddy | 7–12 | 36.84% |
| Sephiroth vs Law | 7–9 | 43.75% |
| Sephiroth vs Dragunov | 10–6 | 62.50% |
| Sephiroth vs Lili | 9–6 | 60.00% |
| Sephiroth vs Jun | 9–5 | 64.29% |
| Sephiroth vs Yoshimitsu | 6–7 | 46.15% |
| Sephiroth vs Xiaoyu | 7–5 | 58.33% |
| Sephiroth vs Azucena | 11–1 | 91.67% |
| Sephiroth vs Lidia | 7–4 | 63.64% |
| Sephiroth vs Devil Jin | 7–3 | 70.00% |
| Sephiroth vs Kuma | 4–5 | 44.44% |
| Sephiroth vs Paul | 4–3 | 57.14% |
| Sephiroth vs Steve | 5–2 | 71.43% |
| Sephiroth vs Feng | 5–2 | 71.43% |
| Sephiroth vs Alisa | 4–3 | 57.14% |
| Sephiroth vs Victor | 4–3 | 57.14% |
| Sephiroth vs Asuka | 3–3 | 50.00% |
| Sephiroth vs Claudio | 2–4 | 33.33% |
| Sephiroth vs Fahkumram | 4–2 | 66.67% |
| Sephiroth vs Leo | 2–3 | 40.00% |
| Sephiroth vs Raven | 4–1 | 80.00% |
| Sephiroth vs Jack-8 | 3–1 | 75.00% |
| Sephiroth vs Nina | 4–0 | 100.00% |
| Sephiroth vs Lee | 2–2 | 50.00% |
| Sephiroth vs Lars | 1–2 | 33.33% |
| Sephiroth vs Zafina | 1–1 | 50.00% |
| Sephiroth vs Leroy | 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.