| Willy_Mays vs Eddy | 5–14 | 26.32% |
| Willy_Mays vs Reina | 9–5 | 64.29% |
| Willy_Mays vs King | 4–9 | 30.77% |
| Willy_Mays vs Law | 2–6 | 25.00% |
| Willy_Mays vs Paul | 3–4 | 42.86% |
| Willy_Mays vs Hwoarang | 3–4 | 42.86% |
| Willy_Mays vs Yoshimitsu | 5–0 | 100.00% |
| Willy_Mays vs Steve | 3–2 | 60.00% |
| Willy_Mays vs Dragunov | 2–3 | 40.00% |
| Willy_Mays vs Lars | 2–3 | 40.00% |
| Willy_Mays vs Leo | 1–3 | 25.00% |
| Willy_Mays vs Leroy | 3–1 | 75.00% |
| Willy_Mays vs Jin | 1–2 | 33.33% |
| Willy_Mays vs Jack-8 | 1–2 | 33.33% |
| Willy_Mays vs Asuka | 1–2 | 33.33% |
| Willy_Mays vs Feng | 1–2 | 33.33% |
| Willy_Mays vs Kuma | 2–1 | 66.67% |
| Willy_Mays vs Raven | 1–2 | 33.33% |
| Willy_Mays vs Nina | 2–0 | 100.00% |
| Willy_Mays vs Lee | 2–0 | 100.00% |
| Willy_Mays vs Azucena | 1–1 | 50.00% |
| Willy_Mays vs Bryan | 1–0 | 100.00% |
| Willy_Mays vs Kazuya | 0–1 | 0.00% |
| Willy_Mays vs Lili | 0–1 | 0.00% |
| Willy_Mays vs Shaheen | 0–1 | 0.00% |
| Willy_Mays vs Jun | 1–0 | 100.00% |
| Willy_Mays vs Victor | 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.