| Eóin Uilleams vs Jin | 36–42 | 46.15% |
| Eóin Uilleams vs Bryan | 31–46 | 40.26% |
| Eóin Uilleams vs King | 32–38 | 45.71% |
| Eóin Uilleams vs Kazuya | 27–39 | 40.91% |
| Eóin Uilleams vs Heihachi | 35–29 | 54.69% |
| Eóin Uilleams vs Steve | 33–24 | 57.89% |
| Eóin Uilleams vs Reina | 35–20 | 63.64% |
| Eóin Uilleams vs Clive | 22–33 | 40.00% |
| Eóin Uilleams vs Law | 25–29 | 46.30% |
| Eóin Uilleams vs Hwoarang | 24–26 | 48.00% |
| Eóin Uilleams vs Paul | 21–27 | 43.75% |
| Eóin Uilleams vs Dragunov | 22–21 | 51.16% |
| Eóin Uilleams vs Lili | 16–19 | 45.71% |
| Eóin Uilleams vs Nina | 15–18 | 45.45% |
| Eóin Uilleams vs Eddy | 11–21 | 34.38% |
| Eóin Uilleams vs Asuka | 14–17 | 45.16% |
| Eóin Uilleams vs Xiaoyu | 21–9 | 70.00% |
| Eóin Uilleams vs Lee | 16–14 | 53.33% |
| Eóin Uilleams vs Devil Jin | 13–15 | 46.43% |
| Eóin Uilleams vs Yoshimitsu | 10–16–1 | 38.46% |
| Eóin Uilleams vs Victor | 14–13 | 51.85% |
| Eóin Uilleams vs Feng | 11–13 | 45.83% |
| Eóin Uilleams vs Jun | 14–10 | 58.33% |
| Eóin Uilleams vs Lars | 11–12 | 47.83% |
| Eóin Uilleams vs Azucena | 7–13 | 35.00% |
| Eóin Uilleams vs Lidia | 12–7 | 63.16% |
| Eóin Uilleams vs Jack-8 | 5–11 | 31.25% |
| Eóin Uilleams vs Leroy | 4–11 | 26.67% |
| Eóin Uilleams vs Zafina | 7–7 | 50.00% |
| Eóin Uilleams vs Alisa | 5–4 | 55.56% |
| Eóin Uilleams vs Claudio | 6–2 | 75.00% |
| Eóin Uilleams vs Kuma | 0–8 | 0.00% |
| Eóin Uilleams vs Leo | 2–4 | 33.33% |
| Eóin Uilleams vs Panda | 1–1 | 50.00% |
| Eóin Uilleams vs Shaheen | 0–1 | 0.00% |
| Eóin Uilleams vs Raven | 1–0 | 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.