| Seishirou vs Reina | 8–9 | 47.06% |
| Seishirou vs King | 3–7 | 30.00% |
| Seishirou vs Victor | 4–6 | 40.00% |
| Seishirou vs Steve | 6–3 | 66.67% |
| Seishirou vs Armor King | 3–6 | 33.33% |
| Seishirou vs Jack-8 | 2–6 | 25.00% |
| Seishirou vs Xiaoyu | 6–1 | 85.71% |
| Seishirou vs Kazuya | 3–4 | 42.86% |
| Seishirou vs Hwoarang | 6–0 | 100.00% |
| Seishirou vs Jin | 1–5 | 16.67% |
| Seishirou vs Lee | 4–2 | 66.67% |
| Seishirou vs Anna | 2–4 | 33.33% |
| Seishirou vs Yoshimitsu | 2–1 | 66.67% |
| Seishirou vs Lili | 0–3 | 0.00% |
| Seishirou vs Dragunov | 0–3 | 0.00% |
| Seishirou vs Leo | 0–3 | 0.00% |
| Seishirou vs Kuma | 2–1 | 66.67% |
| Seishirou vs Leroy | 1–2 | 33.33% |
| Seishirou vs Azucena | 0–3 | 0.00% |
| Seishirou vs Fahkumram | 0–3 | 0.00% |
| Seishirou vs Paul | 0–2 | 0.00% |
| Seishirou vs Law | 0–2 | 0.00% |
| Seishirou vs Bryan | 1–1 | 50.00% |
| Seishirou vs Feng | 0–1 | 0.00% |
| Seishirou vs Heihachi | 0–1 | 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.