| Seishi vs Clive | 6–9 | 40.00% |
| Seishi vs Jun | 3–10 | 23.08% |
| Seishi vs Reina | 6–7 | 46.15% |
| Seishi vs Paul | 5–3 | 62.50% |
| Seishi vs King | 2–6 | 25.00% |
| Seishi vs Jin | 4–4 | 50.00% |
| Seishi vs Steve | 7–1 | 87.50% |
| Seishi vs Lee | 3–4 | 42.86% |
| Seishi vs Law | 2–4 | 33.33% |
| Seishi vs Yoshimitsu | 2–4 | 33.33% |
| Seishi vs Hwoarang | 3–3 | 50.00% |
| Seishi vs Lars | 2–4 | 33.33% |
| Seishi vs Feng | 1–4 | 20.00% |
| Seishi vs Leo | 3–2 | 60.00% |
| Seishi vs Nina | 4–1 | 80.00% |
| Seishi vs Bryan | 3–1 | 75.00% |
| Seishi vs Kazuya | 1–3 | 25.00% |
| Seishi vs Claudio | 2–2 | 50.00% |
| Seishi vs Shaheen | 0–4 | 0.00% |
| Seishi vs Devil Jin | 0–3 | 0.00% |
| Seishi vs Raven | 0–3 | 0.00% |
| Seishi vs Jack-8 | 2–0 | 100.00% |
| Seishi vs Asuka | 2–0 | 100.00% |
| Seishi vs Lili | 0–2 | 0.00% |
| Seishi vs Kuma | 0–2 | 0.00% |
| Seishi vs Zafina | 2–0 | 100.00% |
| Seishi vs Victor | 2–0 | 100.00% |
| Seishi vs Lidia | 0–2 | 0.00% |
| Seishi vs Dragunov | 0–1 | 0.00% |
| Seishi vs Alisa | 0–1 | 0.00% |
| Seishi vs Azucena | 1–0 | 100.00% |
| Seishi 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.