| Seifer vs King | 117–95 | 55.19% |
| Seifer vs Jin | 105–101 | 50.97% |
| Seifer vs Kazuya | 87–117 | 42.65% |
| Seifer vs Dragunov | 97–106 | 47.78% |
| Seifer vs Bryan | 85–76 | 52.80% |
| Seifer vs Hwoarang | 80–69 | 53.69% |
| Seifer vs Steve | 69–72 | 48.94% |
| Seifer vs Paul | 68–68 | 50.00% |
| Seifer vs Armor King | 59–74 | 44.36% |
| Seifer vs Reina | 63–65 | 49.22% |
| Seifer vs Yoshimitsu | 57–60 | 48.72% |
| Seifer vs Lili | 58–44 | 56.86% |
| Seifer vs Law | 39–53 | 42.39% |
| Seifer vs Devil Jin | 46–45 | 50.55% |
| Seifer vs Lee | 56–35 | 61.54% |
| Seifer vs Alisa | 35–50 | 41.18% |
| Seifer vs Heihachi | 42–41 | 50.60% |
| Seifer vs Asuka | 45–37 | 54.88% |
| Seifer vs Jun | 38–31 | 55.07% |
| Seifer vs Lidia | 28–37 | 43.08% |
| Seifer vs Feng | 23–35 | 39.66% |
| Seifer vs Victor | 20–36 | 35.71% |
| Seifer vs Jack-8 | 27–28 | 49.09% |
| Seifer vs Leo | 23–31 | 42.59% |
| Seifer vs Fahkumram | 23–31 | 42.59% |
| Seifer vs Azucena | 23–29 | 44.23% |
| Seifer vs Leroy | 20–30 | 40.00% |
| Seifer vs Claudio | 19–30 | 38.78% |
| Seifer vs Xiaoyu | 25–23 | 52.08% |
| Seifer vs Nina | 16–32 | 33.33% |
| Seifer vs Eddy | 23–21 | 52.27% |
| Seifer vs Lars | 19–19 | 50.00% |
| Seifer vs Raven | 12–25 | 32.43% |
| Seifer vs Anna | 16–18 | 47.06% |
| Seifer vs Clive | 14–18 | 43.75% |
| Seifer vs Zafina | 17–10 | 62.96% |
| Seifer vs Shaheen | 6–16 | 27.27% |
| Seifer vs Miary Zo | 11–11 | 50.00% |
| Seifer vs Kuma | 3–10 | 23.08% |
| Seifer vs Panda | 2–2 | 50.00% |
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.