| Seiji vs Armor King | 49–114 | 30.06% |
| Seiji vs Kazuya | 60–81 | 42.55% |
| Seiji vs Bryan | 37–59 | 38.54% |
| Seiji vs Steve | 41–39 | 51.25% |
| Seiji vs King | 25–46 | 35.21% |
| Seiji vs Jin | 23–46 | 33.33% |
| Seiji vs Hwoarang | 30–32 | 48.39% |
| Seiji vs Dragunov | 26–36 | 41.94% |
| Seiji vs Asuka | 21–24 | 46.67% |
| Seiji vs Reina | 19–25 | 43.18% |
| Seiji vs Paul | 12–30 | 28.57% |
| Seiji vs Law | 14–28 | 33.33% |
| Seiji vs Yoshimitsu | 12–27 | 30.77% |
| Seiji vs Fahkumram | 15–23 | 39.47% |
| Seiji vs Eddy | 14–22 | 38.89% |
| Seiji vs Jun | 10–24 | 29.41% |
| Seiji vs Azucena | 13–18 | 41.94% |
| Seiji vs Lars | 6–23 | 20.69% |
| Seiji vs Lili | 7–20 | 25.93% |
| Seiji vs Xiaoyu | 8–16 | 33.33% |
| Seiji vs Devil Jin | 8–15 | 34.78% |
| Seiji vs Feng | 9–14 | 39.13% |
| Seiji vs Lee | 13–9 | 59.09% |
| Seiji vs Heihachi | 7–12 | 36.84% |
| Seiji vs Lidia | 4–13 | 23.53% |
| Seiji vs Kuma | 4–12 | 25.00% |
| Seiji vs Claudio | 5–10 | 33.33% |
| Seiji vs Clive | 4–11 | 26.67% |
| Seiji vs Victor | 3–11 | 21.43% |
| Seiji vs Leo | 3–9 | 25.00% |
| Seiji vs Leroy | 1–11 | 8.33% |
| Seiji vs Alisa | 2–9 | 18.18% |
| Seiji vs Nina | 7–4 | 63.64% |
| Seiji vs Shaheen | 3–5 | 37.50% |
| Seiji vs Raven | 4–4 | 50.00% |
| Seiji vs Jack-8 | 0–7 | 0.00% |
| Seiji vs Miary Zo | 2–5 | 28.57% |
| Seiji vs Panda | 1–4 | 20.00% |
| Seiji vs Zafina | 2–3 | 40.00% |
| Seiji vs Anna | 0–5 | 0.00% |
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.