| Seff vs Bryan | 63–71 | 47.01% |
| Seff vs Jin | 61–72 | 45.86% |
| Seff vs Kazuya | 52–70 | 42.62% |
| Seff vs Dragunov | 57–62 | 47.90% |
| Seff vs Steve | 48–55 | 46.60% |
| Seff vs Reina | 42–57 | 42.42% |
| Seff vs Lili | 40–56 | 41.67% |
| Seff vs Armor King | 28–65 | 30.11% |
| Seff vs King | 46–46 | 50.00% |
| Seff vs Law | 33–43 | 43.42% |
| Seff vs Yoshimitsu | 35–41 | 46.05% |
| Seff vs Heihachi | 28–42 | 40.00% |
| Seff vs Hwoarang | 24–45 | 34.78% |
| Seff vs Xiaoyu | 35–33 | 51.47% |
| Seff vs Lars | 33–35 | 48.53% |
| Seff vs Clive | 32–27 | 54.24% |
| Seff vs Asuka | 27–30 | 47.37% |
| Seff vs Victor | 18–30 | 37.50% |
| Seff vs Devil Jin | 15–29 | 34.09% |
| Seff vs Paul | 16–27 | 37.21% |
| Seff vs Anna | 23–15 | 60.53% |
| Seff vs Lidia | 18–17 | 51.43% |
| Seff vs Miary Zo | 17–18 | 48.57% |
| Seff vs Eddy | 18–16 | 52.94% |
| Seff vs Leroy | 15–17 | 46.88% |
| Seff vs Feng | 18–13 | 58.06% |
| Seff vs Lee | 11–17 | 39.29% |
| Seff vs Fahkumram | 12–15 | 44.44% |
| Seff vs Alisa | 10–14 | 41.67% |
| Seff vs Claudio | 8–16 | 33.33% |
| Seff vs Jun | 14–10 | 58.33% |
| Seff vs Raven | 13–10 | 56.52% |
| Seff vs Nina | 6–16 | 27.27% |
| Seff vs Shaheen | 6–12 | 33.33% |
| Seff vs Jack-8 | 11–5 | 68.75% |
| Seff vs Azucena | 5–9 | 35.71% |
| Seff vs Leo | 3–10 | 23.08% |
| Seff vs Kuma | 3–7 | 30.00% |
| Seff vs Panda | 5–2 | 71.43% |
| Seff vs Zafina | 1–6 | 14.29% |
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.