| Kowalkski vs Lidia | 17–4 | 80.95% |
| Kowalkski vs Reina | 12–7 | 63.16% |
| Kowalkski vs Law | 6–5 | 54.55% |
| Kowalkski vs Dragunov | 3–7 | 30.00% |
| Kowalkski vs Bryan | 6–3 | 66.67% |
| Kowalkski vs Jun | 4–5 | 44.44% |
| Kowalkski vs King | 6–2 | 75.00% |
| Kowalkski vs Lili | 6–2 | 75.00% |
| Kowalkski vs Eddy | 4–4 | 50.00% |
| Kowalkski vs Yoshimitsu | 4–3 | 57.14% |
| Kowalkski vs Hwoarang | 4–2 | 66.67% |
| Kowalkski vs Asuka | 2–4 | 33.33% |
| Kowalkski vs Leo | 4–2 | 66.67% |
| Kowalkski vs Lars | 3–3 | 50.00% |
| Kowalkski vs Shaheen | 3–3 | 50.00% |
| Kowalkski vs Nina | 2–4 | 33.33% |
| Kowalkski vs Jin | 3–2 | 60.00% |
| Kowalkski vs Kazuya | 2–3 | 40.00% |
| Kowalkski vs Victor | 2–3 | 40.00% |
| Kowalkski vs Devil Jin | 2–2 | 50.00% |
| Kowalkski vs Alisa | 0–4 | 0.00% |
| Kowalkski vs Xiaoyu | 3–0 | 100.00% |
| Kowalkski vs Feng | 2–1 | 66.67% |
| Kowalkski vs Lee | 3–0 | 100.00% |
| Kowalkski vs Leroy | 1–2 | 33.33% |
| Kowalkski vs Steve | 2–0 | 100.00% |
| Kowalkski vs Panda | 2–0 | 100.00% |
| Kowalkski vs Zafina | 2–0 | 100.00% |
| Kowalkski vs Raven | 1–1 | 50.00% |
| Kowalkski vs Heihachi | 0–2 | 0.00% |
| Kowalkski vs Kuma | 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.