| Kowal vs Jin | 35–40 | 46.67% |
| Kowal vs King | 25–37 | 40.32% |
| Kowal vs Steve | 23–27 | 46.00% |
| Kowal vs Hwoarang | 20–26 | 43.48% |
| Kowal vs Law | 14–28 | 33.33% |
| Kowal vs Bryan | 13–29 | 30.95% |
| Kowal vs Dragunov | 22–19 | 53.66% |
| Kowal vs Reina | 23–18 | 56.10% |
| Kowal vs Kazuya | 13–27 | 32.50% |
| Kowal vs Lili | 15–19 | 44.12% |
| Kowal vs Heihachi | 15–19 | 44.12% |
| Kowal vs Victor | 18–15 | 54.55% |
| Kowal vs Eddy | 10–17 | 37.04% |
| Kowal vs Devil Jin | 15–10 | 60.00% |
| Kowal vs Fahkumram | 10–15 | 40.00% |
| Kowal vs Jun | 11–13 | 45.83% |
| Kowal vs Azucena | 14–6 | 70.00% |
| Kowal vs Asuka | 9–10 | 47.37% |
| Kowal vs Alisa | 7–11 | 38.89% |
| Kowal vs Lars | 8–8 | 50.00% |
| Kowal vs Leroy | 3–13 | 18.75% |
| Kowal vs Xiaoyu | 7–8 | 46.67% |
| Kowal vs Clive | 7–7 | 50.00% |
| Kowal vs Nina | 4–9 | 30.77% |
| Kowal vs Paul | 7–5 | 58.33% |
| Kowal vs Claudio | 4–6 | 40.00% |
| Kowal vs Lee | 7–3 | 70.00% |
| Kowal vs Lidia | 5–5 | 50.00% |
| Kowal vs Anna | 2–8 | 20.00% |
| Kowal vs Jack-8 | 4–5 | 44.44% |
| Kowal vs Yoshimitsu | 3–5 | 37.50% |
| Kowal vs Feng | 1–5 | 16.67% |
| Kowal vs Raven | 2–4 | 33.33% |
| Kowal vs Kuma | 2–2 | 50.00% |
| Kowal vs Leo | 3–0 | 100.00% |
| Kowal vs Zafina | 2–1 | 66.67% |
| Kowal vs Shaheen | 0–2 | 0.00% |
| Kowal 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.