| Leszek vs Reina | 32–44 | 42.11% |
| Leszek vs King | 31–41 | 43.06% |
| Leszek vs Law | 33–30 | 52.38% |
| Leszek vs Hwoarang | 24–27 | 47.06% |
| Leszek vs Jin | 23–26 | 46.94% |
| Leszek vs Kazuya | 18–27 | 40.00% |
| Leszek vs Eddy | 18–25 | 41.86% |
| Leszek vs Yoshimitsu | 14–27 | 34.15% |
| Leszek vs Jun | 20–20 | 50.00% |
| Leszek vs Steve | 10–29 | 25.64% |
| Leszek vs Bryan | 12–23 | 34.29% |
| Leszek vs Lidia | 16–14 | 53.33% |
| Leszek vs Lili | 7–20 | 25.93% |
| Leszek vs Dragunov | 6–18 | 25.00% |
| Leszek vs Paul | 7–14 | 33.33% |
| Leszek vs Asuka | 11–10 | 52.38% |
| Leszek vs Xiaoyu | 10–10 | 50.00% |
| Leszek vs Nina | 9–11 | 45.00% |
| Leszek vs Victor | 5–14 | 26.32% |
| Leszek vs Heihachi | 9–10 | 47.37% |
| Leszek vs Lee | 6–12 | 33.33% |
| Leszek vs Alisa | 6–11 | 35.29% |
| Leszek vs Azucena | 6–10 | 37.50% |
| Leszek vs Raven | 5–11 | 31.25% |
| Leszek vs Devil Jin | 2–11 | 15.38% |
| Leszek vs Feng | 3–8 | 27.27% |
| Leszek vs Lars | 3–6 | 33.33% |
| Leszek vs Zafina | 4–5 | 44.44% |
| Leszek vs Jack-8 | 4–4 | 50.00% |
| Leszek vs Claudio | 4–4 | 50.00% |
| Leszek vs Leroy | 4–4 | 50.00% |
| Leszek vs Shaheen | 1–6 | 14.29% |
| Leszek vs Leo | 1–4 | 20.00% |
| Leszek vs Kuma | 1–4 | 20.00% |
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.