| Welpierz vs King | 73–70 | 51.05% |
| Welpierz vs Hwoarang | 67–57 | 54.03% |
| Welpierz vs Kazuya | 70–51 | 57.85% |
| Welpierz vs Jin | 60–55 | 52.17% |
| Welpierz vs Steve | 51–59 | 46.36% |
| Welpierz vs Law | 53–56 | 48.62% |
| Welpierz vs Reina | 61–41 | 59.80% |
| Welpierz vs Dragunov | 47–53 | 47.00% |
| Welpierz vs Bryan | 46–53 | 46.46% |
| Welpierz vs Azucena | 45–44 | 50.56% |
| Welpierz vs Yoshimitsu | 48–37 | 56.47% |
| Welpierz vs Paul | 38–38 | 50.00% |
| Welpierz vs Lee | 51–24 | 68.00% |
| Welpierz vs Victor | 39–36 | 52.00% |
| Welpierz vs Lars | 34–37 | 47.89% |
| Welpierz vs Lili | 41–29 | 58.57% |
| Welpierz vs Devil Jin | 34–31 | 52.31% |
| Welpierz vs Asuka | 24–40 | 37.50% |
| Welpierz vs Nina | 32–32 | 50.00% |
| Welpierz vs Xiaoyu | 30–33 | 47.62% |
| Welpierz vs Leo | 26–35 | 42.62% |
| Welpierz vs Jun | 29–30 | 49.15% |
| Welpierz vs Heihachi | 33–17 | 66.00% |
| Welpierz vs Zafina | 24–24 | 50.00% |
| Welpierz vs Jack-8 | 25–18 | 58.14% |
| Welpierz vs Kuma | 21–22 | 48.84% |
| Welpierz vs Eddy | 20–21 | 48.78% |
| Welpierz vs Claudio | 27–12 | 69.23% |
| Welpierz vs Raven | 21–17 | 55.26% |
| Welpierz vs Leroy | 22–12 | 64.71% |
| Welpierz vs Alisa | 12–21 | 36.36% |
| Welpierz vs Feng | 16–12 | 57.14% |
| Welpierz vs Clive | 13–15 | 46.43% |
| Welpierz vs Lidia | 11–13 | 45.83% |
| Welpierz vs Shaheen | 7–14 | 33.33% |
| Welpierz vs Anna | 3–3 | 50.00% |
| Welpierz vs Fahkumram | 4–1 | 80.00% |
| Welpierz vs Panda | 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.