| Pierozek vs Jin | 42–41 | 50.60% |
| Pierozek vs Kazuya | 40–33 | 54.79% |
| Pierozek vs King | 30–36 | 45.45% |
| Pierozek vs Reina | 35–17 | 67.31% |
| Pierozek vs Hwoarang | 24–22 | 52.17% |
| Pierozek vs Armor King | 22–13 | 62.86% |
| Pierozek vs Asuka | 18–16 | 52.94% |
| Pierozek vs Yoshimitsu | 21–11 | 65.62% |
| Pierozek vs Bryan | 18–13 | 58.06% |
| Pierozek vs Lili | 20–9 | 68.97% |
| Pierozek vs Paul | 14–14 | 50.00% |
| Pierozek vs Dragunov | 15–10 | 60.00% |
| Pierozek vs Jun | 11–14 | 44.00% |
| Pierozek vs Law | 10–14 | 41.67% |
| Pierozek vs Alisa | 8–14 | 36.36% |
| Pierozek vs Lee | 13–9 | 59.09% |
| Pierozek vs Eddy | 13–8 | 61.90% |
| Pierozek vs Steve | 12–8 | 60.00% |
| Pierozek vs Lars | 9–9 | 50.00% |
| Pierozek vs Lidia | 6–11 | 35.29% |
| Pierozek vs Xiaoyu | 7–9 | 43.75% |
| Pierozek vs Jack-8 | 10–6 | 62.50% |
| Pierozek vs Nina | 10–6 | 62.50% |
| Pierozek vs Devil Jin | 4–11 | 26.67% |
| Pierozek vs Feng | 6–9 | 40.00% |
| Pierozek vs Claudio | 5–8 | 38.46% |
| Pierozek vs Heihachi | 9–3 | 75.00% |
| Pierozek vs Leo | 7–4 | 63.64% |
| Pierozek vs Miary Zo | 6–5 | 54.55% |
| Pierozek vs Victor | 7–3 | 70.00% |
| Pierozek vs Kuma | 3–6 | 33.33% |
| Pierozek vs Leroy | 5–4 | 55.56% |
| Pierozek vs Azucena | 4–5 | 44.44% |
| Pierozek vs Shaheen | 5–1 | 83.33% |
| Pierozek vs Fahkumram | 4–2 | 66.67% |
| Pierozek vs Zafina | 3–1 | 75.00% |
| Pierozek vs Raven | 3–1 | 75.00% |
| Pierozek vs Anna | 3–1 | 75.00% |
| Pierozek vs Clive | 0–2 | 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.