| Willyams vs Armor King | 14–7 | 66.67% |
| Willyams vs King | 9–2 | 81.82% |
| Willyams vs Steve | 6–5 | 54.55% |
| Willyams vs Law | 9–1 | 90.00% |
| Willyams vs Jin | 8–2 | 80.00% |
| Willyams vs Hwoarang | 7–1 | 87.50% |
| Willyams vs Kazuya | 3–5 | 37.50% |
| Willyams vs Reina | 4–4 | 50.00% |
| Willyams vs Jack-8 | 3–3 | 50.00% |
| Willyams vs Lili | 2–4 | 33.33% |
| Willyams vs Lars | 3–3 | 50.00% |
| Willyams vs Victor | 3–3 | 50.00% |
| Willyams vs Raven | 4–2 | 66.67% |
| Willyams vs Eddy | 3–3 | 50.00% |
| Willyams vs Paul | 3–2 | 60.00% |
| Willyams vs Dragunov | 4–1 | 80.00% |
| Willyams vs Yoshimitsu | 3–1 | 75.00% |
| Willyams vs Alisa | 2–2 | 50.00% |
| Willyams vs Shaheen | 2–2 | 50.00% |
| Willyams vs Azucena | 4–0 | 100.00% |
| Willyams vs Lidia | 3–1 | 75.00% |
| Willyams vs Heihachi | 4–0 | 100.00% |
| Willyams vs Xiaoyu | 1–2 | 33.33% |
| Willyams vs Clive | 2–1 | 66.67% |
| Willyams vs Bryan | 0–2 | 0.00% |
| Willyams vs Asuka | 2–0 | 100.00% |
| Willyams vs Kuma | 0–2 | 0.00% |
| Willyams vs Jun | 2–0 | 100.00% |
| Willyams vs Anna | 0–2 | 0.00% |
| Willyams vs Nina | 0–1 | 0.00% |
| Willyams vs Leroy | 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.