| William-Cunha vs Eddy | 48–23 | 67.61% |
| William-Cunha vs King | 48–19 | 71.64% |
| William-Cunha vs Reina | 47–18 | 72.31% |
| William-Cunha vs Heihachi | 39–25 | 60.94% |
| William-Cunha vs Jin | 24–25 | 48.98% |
| William-Cunha vs Clive | 25–24 | 51.02% |
| William-Cunha vs Hwoarang | 26–20 | 56.52% |
| William-Cunha vs Xiaoyu | 30–13 | 69.77% |
| William-Cunha vs Kazuya | 29–9 | 76.32% |
| William-Cunha vs Bryan | 26–11 | 70.27% |
| William-Cunha vs Asuka | 19–18 | 51.35% |
| William-Cunha vs Law | 21–15 | 58.33% |
| William-Cunha vs Jun | 28–8 | 77.78% |
| William-Cunha vs Devil Jin | 21–14 | 60.00% |
| William-Cunha vs Lili | 29–4 | 87.88% |
| William-Cunha vs Dragunov | 23–7 | 76.67% |
| William-Cunha vs Lars | 21–8 | 72.41% |
| William-Cunha vs Claudio | 20–9 | 68.97% |
| William-Cunha vs Nina | 23–6 | 79.31% |
| William-Cunha vs Paul | 21–6 | 77.78% |
| William-Cunha vs Alisa | 19–5 | 79.17% |
| William-Cunha vs Lee | 16–6 | 72.73% |
| William-Cunha vs Yoshimitsu | 7–13 | 35.00% |
| William-Cunha vs Azucena | 15–4 | 78.95% |
| William-Cunha vs Steve | 13–5 | 72.22% |
| William-Cunha vs Leo | 8–9 | 47.06% |
| William-Cunha vs Kuma | 8–8 | 50.00% |
| William-Cunha vs Shaheen | 8–6 | 57.14% |
| William-Cunha vs Victor | 11–3 | 78.57% |
| William-Cunha vs Lidia | 5–8 | 38.46% |
| William-Cunha vs Jack-8 | 7–5 | 58.33% |
| William-Cunha vs Zafina | 8–2 | 80.00% |
| William-Cunha vs Leroy | 4–5 | 44.44% |
| William-Cunha vs Raven | 6–1 | 85.71% |
| William-Cunha vs Anna | 6–0 | 100.00% |
| William-Cunha vs Feng | 3–1 | 75.00% |
| William-Cunha vs Panda | 4–0 | 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.