| King Willie vs King | 46–31 | 59.74% |
| King Willie vs Hwoarang | 28–44 | 38.89% |
| King Willie vs Kazuya | 36–30 | 54.55% |
| King Willie vs Lili | 31–34 | 47.69% |
| King Willie vs Jin | 38–25 | 60.32% |
| King Willie vs Lars | 30–25 | 54.55% |
| King Willie vs Steve | 41–13 | 75.93% |
| King Willie vs Law | 33–18 | 64.71% |
| King Willie vs Dragunov | 24–26 | 48.00% |
| King Willie vs Eddy | 35–15 | 70.00% |
| King Willie vs Victor | 22–25 | 46.81% |
| King Willie vs Reina | 27–13 | 67.50% |
| King Willie vs Yoshimitsu | 18–20 | 47.37% |
| King Willie vs Alisa | 17–20 | 45.95% |
| King Willie vs Lee | 19–15 | 55.88% |
| King Willie vs Asuka | 22–11 | 66.67% |
| King Willie vs Xiaoyu | 21–11 | 65.62% |
| King Willie vs Devil Jin | 18–13 | 58.06% |
| King Willie vs Jack-8 | 19–11 | 63.33% |
| King Willie vs Bryan | 17–12 | 58.62% |
| King Willie vs Azucena | 17–11 | 60.71% |
| King Willie vs Feng | 13–13 | 50.00% |
| King Willie vs Shaheen | 13–13 | 50.00% |
| King Willie vs Nina | 9–17 | 34.62% |
| King Willie vs Paul | 16–9 | 64.00% |
| King Willie vs Leo | 17–8 | 68.00% |
| King Willie vs Jun | 17–8 | 68.00% |
| King Willie vs Zafina | 17–5 | 77.27% |
| King Willie vs Leroy | 13–9 | 59.09% |
| King Willie vs Claudio | 12–9 | 57.14% |
| King Willie vs Raven | 11–10 | 52.38% |
| King Willie vs Kuma | 6–5 | 54.55% |
| King Willie vs Lidia | 6–3 | 66.67% |
| King Willie vs Panda | 2–0 | 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.