| Ziecko vs Steve | 10–11 | 47.62% |
| Ziecko vs King | 6–10 | 37.50% |
| Ziecko vs Reina | 7–7 | 50.00% |
| Ziecko vs Dragunov | 4–7 | 36.36% |
| Ziecko vs Eddy | 6–5 | 54.55% |
| Ziecko vs Claudio | 2–8 | 20.00% |
| Ziecko vs Bryan | 2–6 | 25.00% |
| Ziecko vs Lili | 4–4 | 50.00% |
| Ziecko vs Victor | 1–7 | 12.50% |
| Ziecko vs Hwoarang | 3–4 | 42.86% |
| Ziecko vs Kazuya | 1–5 | 16.67% |
| Ziecko vs Zafina | 1–4–1 | 20.00% |
| Ziecko vs Paul | 4–1 | 80.00% |
| Ziecko vs Jack-8 | 2–3 | 40.00% |
| Ziecko vs Devil Jin | 1–4 | 20.00% |
| Ziecko vs Clive | 2–3 | 40.00% |
| Ziecko vs Yoshimitsu | 1–2 | 33.33% |
| Ziecko vs Jin | 1–2 | 33.33% |
| Ziecko vs Asuka | 2–1 | 66.67% |
| Ziecko vs Lars | 0–3 | 0.00% |
| Ziecko vs Fahkumram | 2–1 | 66.67% |
| Ziecko vs Law | 0–2 | 0.00% |
| Ziecko vs Shaheen | 0–2 | 0.00% |
| Ziecko vs Jun | 0–2 | 0.00% |
| Ziecko vs Raven | 0–2 | 0.00% |
| Ziecko vs Armor King | 0–2 | 0.00% |
| Ziecko vs Azucena | 0–1 | 0.00% |
| Ziecko vs Miary Zo | 0–1 | 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.