| Peter Kowalczyk vs Jin | 702–669 | 51.20% |
| Peter Kowalczyk vs Hwoarang | 674–638 | 51.37% |
| Peter Kowalczyk vs Kazuya | 622–667 | 48.25% |
| Peter Kowalczyk vs Bryan | 580–624 | 48.17% |
| Peter Kowalczyk vs King | 602–580 | 50.93% |
| Peter Kowalczyk vs Law | 550–436 | 55.78% |
| Peter Kowalczyk vs Paul | 484–455 | 51.54% |
| Peter Kowalczyk vs Steve | 412–431 | 48.87% |
| Peter Kowalczyk vs Yoshimitsu | 414–378 | 52.27% |
| Peter Kowalczyk vs Heihachi | 349–365 | 48.88% |
| Peter Kowalczyk vs Dragunov | 340–337 | 50.22% |
| Peter Kowalczyk vs Devil Jin | 300–361 | 45.39% |
| Peter Kowalczyk vs Lili | 321–316 | 50.39% |
| Peter Kowalczyk vs Reina | 272–320 | 45.95% |
| Peter Kowalczyk vs Lars | 315–270–1 | 53.85% |
| Peter Kowalczyk vs Xiaoyu | 327–247 | 56.97% |
| Peter Kowalczyk vs Feng | 310–248 | 55.56% |
| Peter Kowalczyk vs Lee | 252–298 | 45.82% |
| Peter Kowalczyk vs Eddy | 282–232 | 54.86% |
| Peter Kowalczyk vs Asuka | 240–273 | 46.78% |
| Peter Kowalczyk vs Nina | 273–239 | 53.32% |
| Peter Kowalczyk vs Azucena | 247–228 | 52.00% |
| Peter Kowalczyk vs Jun | 233–205 | 53.20% |
| Peter Kowalczyk vs Victor | 191–235 | 44.84% |
| Peter Kowalczyk vs Raven | 193–227 | 45.95% |
| Peter Kowalczyk vs Alisa | 215–197 | 52.18% |
| Peter Kowalczyk vs Leroy | 167–208 | 44.53% |
| Peter Kowalczyk vs Lidia | 133–174 | 43.32% |
| Peter Kowalczyk vs Zafina | 126–170 | 42.57% |
| Peter Kowalczyk vs Claudio | 124–171 | 42.03% |
| Peter Kowalczyk vs Jack-8 | 143–150 | 48.81% |
| Peter Kowalczyk vs Leo | 144–132 | 52.17% |
| Peter Kowalczyk vs Anna | 126–118 | 51.64% |
| Peter Kowalczyk vs Clive | 107–131 | 44.96% |
| Peter Kowalczyk vs Shaheen | 117–84 | 58.21% |
| Peter Kowalczyk vs Kuma | 96–98 | 49.48% |
| Peter Kowalczyk vs Fahkumram | 82–92 | 47.13% |
| Peter Kowalczyk vs Armor King | 84–73 | 53.50% |
| Peter Kowalczyk vs Panda | 41–50 | 45.05% |
| Peter Kowalczyk vs Miary Zo | 10–24 | 29.41% |
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.