| WILLIANp15 vs Reina | 14–10 | 58.33% |
| WILLIANp15 vs Lili | 12–6 | 66.67% |
| WILLIANp15 vs Steve | 5–12 | 29.41% |
| WILLIANp15 vs King | 9–7 | 56.25% |
| WILLIANp15 vs Jin | 10–6 | 62.50% |
| WILLIANp15 vs Law | 4–11 | 26.67% |
| WILLIANp15 vs Victor | 3–7 | 30.00% |
| WILLIANp15 vs Kazuya | 2–7 | 22.22% |
| WILLIANp15 vs Azucena | 6–3 | 66.67% |
| WILLIANp15 vs Devil Jin | 3–5 | 37.50% |
| WILLIANp15 vs Eddy | 2–6 | 25.00% |
| WILLIANp15 vs Lars | 4–3 | 57.14% |
| WILLIANp15 vs Shaheen | 2–4 | 33.33% |
| WILLIANp15 vs Hwoarang | 3–2 | 60.00% |
| WILLIANp15 vs Bryan | 4–1 | 80.00% |
| WILLIANp15 vs Jack-8 | 1–4 | 20.00% |
| WILLIANp15 vs Asuka | 3–2 | 60.00% |
| WILLIANp15 vs Anna | 2–3 | 40.00% |
| WILLIANp15 vs Alisa | 0–4 | 0.00% |
| WILLIANp15 vs Heihachi | 0–4 | 0.00% |
| WILLIANp15 vs Clive | 2–2 | 50.00% |
| WILLIANp15 vs Armor King | 2–2 | 50.00% |
| WILLIANp15 vs Panda | 2–1 | 66.67% |
| WILLIANp15 vs Paul | 0–2 | 0.00% |
| WILLIANp15 vs Yoshimitsu | 0–2 | 0.00% |
| WILLIANp15 vs Leo | 0–2 | 0.00% |
| WILLIANp15 vs Nina | 2–0 | 100.00% |
| WILLIANp15 vs Jun | 0–2 | 0.00% |
| WILLIANp15 vs Lidia | 2–0 | 100.00% |
| WILLIANp15 vs Dragunov | 0–1 | 0.00% |
| WILLIANp15 vs Claudio | 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.