| Piwko vs Yoshimitsu | 8–15 | 34.78% |
| Piwko vs Jin | 11–11 | 50.00% |
| Piwko vs Steve | 5–11 | 31.25% |
| Piwko vs Reina | 4–10 | 28.57% |
| Piwko vs Dragunov | 3–10 | 23.08% |
| Piwko vs Law | 6–5 | 54.55% |
| Piwko vs King | 3–8 | 27.27% |
| Piwko vs Lee | 4–5 | 44.44% |
| Piwko vs Lidia | 1–8 | 11.11% |
| Piwko vs Paul | 4–4 | 50.00% |
| Piwko vs Asuka | 3–5 | 37.50% |
| Piwko vs Jun | 6–2 | 75.00% |
| Piwko vs Bryan | 3–4 | 42.86% |
| Piwko vs Kazuya | 2–5 | 28.57% |
| Piwko vs Lili | 1–5 | 16.67% |
| Piwko vs Hwoarang | 3–2 | 60.00% |
| Piwko vs Shaheen | 1–4 | 20.00% |
| Piwko vs Eddy | 3–2 | 60.00% |
| Piwko vs Alisa | 2–2 | 50.00% |
| Piwko vs Nina | 2–2 | 50.00% |
| Piwko vs Azucena | 2–2 | 50.00% |
| Piwko vs Xiaoyu | 1–2 | 33.33% |
| Piwko vs Claudio | 0–3 | 0.00% |
| Piwko vs Raven | 2–1 | 66.67% |
| Piwko vs Feng | 0–2 | 0.00% |
| Piwko vs Leo | 2–0 | 100.00% |
| Piwko vs Lars | 2–0 | 100.00% |
| Piwko vs Clive | 0–2 | 0.00% |
| Piwko vs Anna | 0–2 | 0.00% |
| Piwko vs Victor | 1–0 | 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.