| Sephiroth vs Jin | 444–457 | 49.28% |
| Sephiroth vs Kazuya | 450–445 | 50.28% |
| Sephiroth vs Bryan | 384–375 | 50.59% |
| Sephiroth vs King | 322–320 | 50.16% |
| Sephiroth vs Reina | 343–267 | 56.23% |
| Sephiroth vs Hwoarang | 280–286 | 49.47% |
| Sephiroth vs Paul | 258–262 | 49.62% |
| Sephiroth vs Dragunov | 241–271 | 47.07% |
| Sephiroth vs Heihachi | 250–237 | 51.33% |
| Sephiroth vs Yoshimitsu | 237–241 | 49.58% |
| Sephiroth vs Law | 241–222 | 52.05% |
| Sephiroth vs Steve | 191–234 | 44.94% |
| Sephiroth vs Lee | 216–205 | 51.31% |
| Sephiroth vs Lili | 196–206 | 48.76% |
| Sephiroth vs Devil Jin | 178–202 | 46.84% |
| Sephiroth vs Feng | 155–158 | 49.52% |
| Sephiroth vs Lars | 127–172 | 42.47% |
| Sephiroth vs Jun | 150–136 | 52.45% |
| Sephiroth vs Asuka | 127–152 | 45.52% |
| Sephiroth vs Azucena | 135–139 | 49.27% |
| Sephiroth vs Xiaoyu | 151–112 | 57.41% |
| Sephiroth vs Nina | 107–141 | 43.15% |
| Sephiroth vs Victor | 120–126 | 48.78% |
| Sephiroth vs Eddy | 90–145 | 38.30% |
| Sephiroth vs Alisa | 125–107 | 53.88% |
| Sephiroth vs Clive | 110–117 | 48.46% |
| Sephiroth vs Lidia | 121–104 | 53.78% |
| Sephiroth vs Leo | 90–124 | 42.06% |
| Sephiroth vs Raven | 109–92 | 54.23% |
| Sephiroth vs Claudio | 112–87 | 56.28% |
| Sephiroth vs Leroy | 87–84 | 50.88% |
| Sephiroth vs Jack-8 | 73–91 | 44.51% |
| Sephiroth vs Kuma | 45–86 | 34.35% |
| Sephiroth vs Shaheen | 46–74 | 38.33% |
| Sephiroth vs Zafina | 46–59 | 43.81% |
| Sephiroth vs Armor King | 44–53 | 45.36% |
| Sephiroth vs Anna | 39–48 | 44.83% |
| Sephiroth vs Panda | 25–29 | 46.30% |
| Sephiroth vs Fahkumram | 16–26 | 38.10% |
| Sephiroth vs Miary Zo | 8–15 | 34.78% |
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.