| C4K9 vs Eddy | 6–23 | 20.69% |
| C4K9 vs Reina | 4–14 | 22.22% |
| C4K9 vs Yoshimitsu | 10–5 | 66.67% |
| C4K9 vs Lee | 4–7 | 36.36% |
| C4K9 vs Bryan | 2–7 | 22.22% |
| C4K9 vs Asuka | 0–9 | 0.00% |
| C4K9 vs Leroy | 5–4 | 55.56% |
| C4K9 vs Steve | 6–2 | 75.00% |
| C4K9 vs Dragunov | 2–6 | 25.00% |
| C4K9 vs Nina | 3–4 | 42.86% |
| C4K9 vs Jun | 4–3 | 57.14% |
| C4K9 vs Azucena | 3–4 | 42.86% |
| C4K9 vs Paul | 3–3 | 50.00% |
| C4K9 vs King | 4–2 | 66.67% |
| C4K9 vs Hwoarang | 2–4 | 33.33% |
| C4K9 vs Lili | 3–3 | 50.00% |
| C4K9 vs Lars | 3–3 | 50.00% |
| C4K9 vs Victor | 1–5 | 16.67% |
| C4K9 vs Law | 0–4 | 0.00% |
| C4K9 vs Kazuya | 1–3 | 25.00% |
| C4K9 vs Alisa | 2–2 | 50.00% |
| C4K9 vs Xiaoyu | 2–1 | 66.67% |
| C4K9 vs Jin | 2–1 | 66.67% |
| C4K9 vs Devil Jin | 3–0 | 100.00% |
| C4K9 vs Kuma | 0–3 | 0.00% |
| C4K9 vs Jack-8 | 0–2 | 0.00% |
| C4K9 vs Feng | 0–2 | 0.00% |
| C4K9 vs Leo | 1–1 | 50.00% |
| C4K9 vs Claudio | 0–2 | 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.