| william chen vs Reina | 53–55 | 49.07% |
| william chen vs Jin | 29–55 | 34.52% |
| william chen vs Jun | 47–36 | 56.63% |
| william chen vs Paul | 34–47 | 41.98% |
| william chen vs Dragunov | 34–43 | 44.16% |
| william chen vs Eddy | 26–48 | 35.14% |
| william chen vs King | 40–31 | 56.34% |
| william chen vs Asuka | 34–34 | 50.00% |
| william chen vs Victor | 35–32 | 52.24% |
| william chen vs Kazuya | 28–38 | 42.42% |
| william chen vs Lili | 28–34 | 45.16% |
| william chen vs Hwoarang | 27–34 | 44.26% |
| william chen vs Azucena | 19–38 | 33.33% |
| william chen vs Bryan | 26–22 | 54.17% |
| william chen vs Devil Jin | 19–29 | 39.58% |
| william chen vs Feng | 14–26 | 35.00% |
| william chen vs Yoshimitsu | 15–24 | 38.46% |
| william chen vs Xiaoyu | 19–18 | 51.35% |
| william chen vs Alisa | 7–29 | 19.44% |
| william chen vs Law | 15–20 | 42.86% |
| william chen vs Nina | 16–18 | 47.06% |
| william chen vs Lars | 7–22 | 24.14% |
| william chen vs Leroy | 12–17 | 41.38% |
| william chen vs Steve | 13–15 | 46.43% |
| william chen vs Jack-8 | 6–18 | 25.00% |
| william chen vs Leo | 13–10 | 56.52% |
| william chen vs Lee | 7–15 | 31.82% |
| william chen vs Raven | 7–12 | 36.84% |
| william chen vs Kuma | 5–13 | 27.78% |
| william chen vs Claudio | 10–3 | 76.92% |
| william chen vs Shaheen | 4–6 | 40.00% |
| william chen vs Zafina | 3–2 | 60.00% |
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.