| Koii vs Asuka | 9–8 | 52.94% |
| Koii vs Dragunov | 11–5 | 68.75% |
| Koii vs Yoshimitsu | 7–7 | 50.00% |
| Koii vs Kazuya | 10–4 | 71.43% |
| Koii vs King | 6–7 | 46.15% |
| Koii vs Jin | 9–4 | 69.23% |
| Koii vs Reina | 8–5 | 61.54% |
| Koii vs Eddy | 2–9 | 18.18% |
| Koii vs Paul | 7–3 | 70.00% |
| Koii vs Hwoarang | 5–5 | 50.00% |
| Koii vs Jun | 8–2 | 80.00% |
| Koii vs Xiaoyu | 6–3 | 66.67% |
| Koii vs Lili | 3–5 | 37.50% |
| Koii vs Azucena | 5–2 | 71.43% |
| Koii vs Feng | 2–4 | 33.33% |
| Koii vs Lars | 6–0 | 100.00% |
| Koii vs Devil Jin | 4–1 | 80.00% |
| Koii vs Shaheen | 4–1 | 80.00% |
| Koii vs Victor | 4–1 | 80.00% |
| Koii vs Law | 0–4 | 0.00% |
| Koii vs Claudio | 1–3 | 25.00% |
| Koii vs Steve | 0–2 | 0.00% |
| Koii vs Leo | 0–2 | 0.00% |
| Koii vs Alisa | 2–0 | 100.00% |
| Koii vs Nina | 0–2 | 0.00% |
| Koii vs Lee | 0–2 | 0.00% |
| Koii vs Zafina | 2–0 | 100.00% |
| Koii vs Raven | 0–2 | 0.00% |
| Koii vs Jack-8 | 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.