| Cassius vs Reina | 12–1 | 92.31% |
| Cassius vs King | 7–5 | 58.33% |
| Cassius vs Law | 8–3 | 72.73% |
| Cassius vs Paul | 7–1 | 87.50% |
| Cassius vs Hwoarang | 7–0 | 100.00% |
| Cassius vs Jin | 4–3 | 57.14% |
| Cassius vs Jack-8 | 4–3 | 57.14% |
| Cassius vs Xiaoyu | 4–1 | 80.00% |
| Cassius vs Devil Jin | 2–3 | 40.00% |
| Cassius vs Yoshimitsu | 1–3 | 25.00% |
| Cassius vs Eddy | 3–1 | 75.00% |
| Cassius vs Kazuya | 2–1 | 66.67% |
| Cassius vs Dragunov | 3–0 | 100.00% |
| Cassius vs Claudio | 2–1 | 66.67% |
| Cassius vs Clive | 2–1 | 66.67% |
| Cassius vs Asuka | 2–0 | 100.00% |
| Cassius vs Lili | 0–2 | 0.00% |
| Cassius vs Leo | 1–1 | 50.00% |
| Cassius vs Lee | 0–2 | 0.00% |
| Cassius vs Zafina | 2–0 | 100.00% |
| Cassius vs Jun | 1–1 | 50.00% |
| Cassius vs Lidia | 2–0 | 100.00% |
| Cassius vs Bryan | 0–1 | 0.00% |
| Cassius vs Steve | 0–1 | 0.00% |
| Cassius vs Lars | 1–0 | 100.00% |
| Cassius vs Leroy | 1–0 | 100.00% |
| Cassius vs Victor | 1–0 | 100.00% |
| Cassius vs Heihachi | 1–0 | 100.00% |
| Cassius vs Anna | 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.