| Koyyyy vs Eddy | 8–26 | 23.53% |
| Koyyyy vs Hwoarang | 13–10 | 56.52% |
| Koyyyy vs Reina | 13–5 | 72.22% |
| Koyyyy vs Bryan | 9–6 | 60.00% |
| Koyyyy vs King | 4–10 | 28.57% |
| Koyyyy vs Jin | 8–6 | 57.14% |
| Koyyyy vs Steve | 6–8 | 42.86% |
| Koyyyy vs Victor | 5–7 | 41.67% |
| Koyyyy vs Kazuya | 6–6 | 50.00% |
| Koyyyy vs Jun | 6–5 | 54.55% |
| Koyyyy vs Asuka | 4–7 | 36.36% |
| Koyyyy vs Nina | 4–6 | 40.00% |
| Koyyyy vs Law | 1–8 | 11.11% |
| Koyyyy vs Lili | 3–6 | 33.33% |
| Koyyyy vs Dragunov | 4–5 | 44.44% |
| Koyyyy vs Azucena | 4–4 | 50.00% |
| Koyyyy vs Paul | 2–6 | 25.00% |
| Koyyyy vs Lee | 3–4 | 42.86% |
| Koyyyy vs Leroy | 3–4 | 42.86% |
| Koyyyy vs Lars | 2–4 | 33.33% |
| Koyyyy vs Yoshimitsu | 1–5 | 16.67% |
| Koyyyy vs Leo | 5–1 | 83.33% |
| Koyyyy vs Devil Jin | 2–3 | 40.00% |
| Koyyyy vs Claudio | 1–4 | 20.00% |
| Koyyyy vs Xiaoyu | 1–4 | 20.00% |
| Koyyyy vs Jack-8 | 3–1 | 75.00% |
| Koyyyy vs Kuma | 1–2 | 33.33% |
| Koyyyy vs Alisa | 0–3 | 0.00% |
| Koyyyy vs Feng | 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.