| Koukounas vs Kazuya | 20–33 | 37.74% |
| Koukounas vs Jin | 30–22 | 57.69% |
| Koukounas vs Hwoarang | 28–20 | 58.33% |
| Koukounas vs King | 20–25 | 44.44% |
| Koukounas vs Steve | 20–22 | 47.62% |
| Koukounas vs Law | 24–14 | 63.16% |
| Koukounas vs Dragunov | 17–12 | 58.62% |
| Koukounas vs Reina | 15–13 | 53.57% |
| Koukounas vs Nina | 17–10 | 62.96% |
| Koukounas vs Azucena | 15–12 | 55.56% |
| Koukounas vs Jun | 18–8 | 69.23% |
| Koukounas vs Paul | 14–11 | 56.00% |
| Koukounas vs Bryan | 11–14 | 44.00% |
| Koukounas vs Eddy | 11–12 | 47.83% |
| Koukounas vs Lili | 15–7 | 68.18% |
| Koukounas vs Heihachi | 15–6 | 71.43% |
| Koukounas vs Yoshimitsu | 10–9 | 52.63% |
| Koukounas vs Asuka | 9–6 | 60.00% |
| Koukounas vs Devil Jin | 9–6 | 60.00% |
| Koukounas vs Lidia | 3–11 | 21.43% |
| Koukounas vs Victor | 5–8 | 38.46% |
| Koukounas vs Clive | 8–5 | 61.54% |
| Koukounas vs Lee | 6–6 | 50.00% |
| Koukounas vs Feng | 6–5 | 54.55% |
| Koukounas vs Claudio | 5–6 | 45.45% |
| Koukounas vs Lars | 6–4 | 60.00% |
| Koukounas vs Xiaoyu | 6–3 | 66.67% |
| Koukounas vs Raven | 6–3 | 66.67% |
| Koukounas vs Anna | 6–3 | 66.67% |
| Koukounas vs Alisa | 4–4 | 50.00% |
| Koukounas vs Fahkumram | 6–2 | 75.00% |
| Koukounas vs Leroy | 4–3 | 57.14% |
| Koukounas vs Jack-8 | 2–2 | 50.00% |
| Koukounas vs Zafina | 3–1 | 75.00% |
| Koukounas vs Leo | 2–0 | 100.00% |
| Koukounas vs Kuma | 0–2 | 0.00% |
| Koukounas vs Panda | 2–0 | 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.