| Seiga vs King | 18–5 | 78.26% |
| Seiga vs Jin | 13–5 | 72.22% |
| Seiga vs Dragunov | 10–7 | 58.82% |
| Seiga vs Reina | 13–3 | 81.25% |
| Seiga vs Hwoarang | 9–3 | 75.00% |
| Seiga vs Azucena | 4–8 | 33.33% |
| Seiga vs Kazuya | 8–3 | 72.73% |
| Seiga vs Jun | 9–2 | 81.82% |
| Seiga vs Eddy | 4–6 | 40.00% |
| Seiga vs Lars | 6–2 | 75.00% |
| Seiga vs Law | 4–3 | 57.14% |
| Seiga vs Devil Jin | 6–0 | 100.00% |
| Seiga vs Lee | 5–1 | 83.33% |
| Seiga vs Victor | 4–2 | 66.67% |
| Seiga vs Feng | 4–1 | 80.00% |
| Seiga vs Jack-8 | 2–2 | 50.00% |
| Seiga vs Lili | 4–0 | 100.00% |
| Seiga vs Steve | 2–1 | 66.67% |
| Seiga vs Alisa | 3–0 | 100.00% |
| Seiga vs Nina | 2–1 | 66.67% |
| Seiga vs Paul | 2–0 | 100.00% |
| Seiga vs Xiaoyu | 1–1 | 50.00% |
| Seiga vs Leo | 0–2 | 0.00% |
| Seiga vs Claudio | 0–2 | 0.00% |
| Seiga vs Kuma | 2–0 | 100.00% |
| Seiga vs Zafina | 2–0 | 100.00% |
| Seiga vs Leroy | 1–1 | 50.00% |
| Seiga vs Heihachi | 2–0 | 100.00% |
| Seiga vs Asuka | 1–0 | 100.00% |
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.