| Seifer vs Kazuya | 99–68 | 59.28% |
| Seifer vs Jin | 43–62 | 40.95% |
| Seifer vs Heihachi | 41–59 | 41.00% |
| Seifer vs Reina | 48–51 | 48.48% |
| Seifer vs King | 36–57 | 38.71% |
| Seifer vs Paul | 32–36 | 47.06% |
| Seifer vs Dragunov | 30–38 | 44.12% |
| Seifer vs Yoshimitsu | 35–32 | 52.24% |
| Seifer vs Bryan | 23–37 | 38.33% |
| Seifer vs Lili | 24–35 | 40.68% |
| Seifer vs Devil Jin | 23–30 | 43.40% |
| Seifer vs Steve | 24–26 | 48.00% |
| Seifer vs Law | 20–29 | 40.82% |
| Seifer vs Hwoarang | 13–34 | 27.66% |
| Seifer vs Eddy | 15–31 | 32.61% |
| Seifer vs Lee | 21–21 | 50.00% |
| Seifer vs Azucena | 24–18 | 57.14% |
| Seifer vs Asuka | 16–23 | 41.03% |
| Seifer vs Jun | 15–24 | 38.46% |
| Seifer vs Nina | 11–21 | 34.38% |
| Seifer vs Lars | 9–16 | 36.00% |
| Seifer vs Xiaoyu | 10–14 | 41.67% |
| Seifer vs Feng | 13–11 | 54.17% |
| Seifer vs Victor | 15–9 | 62.50% |
| Seifer vs Claudio | 9–14 | 39.13% |
| Seifer vs Leroy | 13–8 | 61.90% |
| Seifer vs Leo | 4–16 | 20.00% |
| Seifer vs Jack-8 | 11–8 | 57.89% |
| Seifer vs Lidia | 10–9 | 52.63% |
| Seifer vs Clive | 9–8 | 52.94% |
| Seifer vs Anna | 11–6 | 64.71% |
| Seifer vs Shaheen | 7–9 | 43.75% |
| Seifer vs Alisa | 4–8 | 33.33% |
| Seifer vs Panda | 7–4 | 63.64% |
| Seifer vs Raven | 2–7 | 22.22% |
| Seifer vs Kuma | 4–2 | 66.67% |
| Seifer vs Zafina | 3–1 | 75.00% |
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.