| William.T.Four vs King | 115–131 | 46.75% |
| William.T.Four vs Kazuya | 84–111 | 43.08% |
| William.T.Four vs Steve | 74–87 | 45.96% |
| William.T.Four vs Reina | 57–102 | 35.85% |
| William.T.Four vs Hwoarang | 55–98 | 35.95% |
| William.T.Four vs Jin | 52–88 | 37.14% |
| William.T.Four vs Jun | 46–89 | 34.07% |
| William.T.Four vs Heihachi | 56–79 | 41.48% |
| William.T.Four vs Law | 46–84 | 35.38% |
| William.T.Four vs Bryan | 49–81 | 37.69% |
| William.T.Four vs Yoshimitsu | 41–60 | 40.59% |
| William.T.Four vs Azucena | 37–56 | 39.78% |
| William.T.Four vs Eddy | 23–70 | 24.73% |
| William.T.Four vs Lili | 34–57 | 37.36% |
| William.T.Four vs Victor | 33–56 | 37.08% |
| William.T.Four vs Dragunov | 36–49 | 42.35% |
| William.T.Four vs Asuka | 34–50 | 40.48% |
| William.T.Four vs Paul | 31–51 | 37.80% |
| William.T.Four vs Leroy | 27–39 | 40.91% |
| William.T.Four vs Devil Jin | 19–45 | 29.69% |
| William.T.Four vs Lars | 30–34 | 46.88% |
| William.T.Four vs Nina | 29–34 | 46.03% |
| William.T.Four vs Clive | 19–40 | 32.20% |
| William.T.Four vs Leo | 22–36 | 37.93% |
| William.T.Four vs Lidia | 24–34 | 41.38% |
| William.T.Four vs Lee | 22–35 | 38.60% |
| William.T.Four vs Alisa | 18–35 | 33.96% |
| William.T.Four vs Feng | 14–36 | 28.00% |
| William.T.Four vs Raven | 14–34 | 29.17% |
| William.T.Four vs Xiaoyu | 18–29 | 38.30% |
| William.T.Four vs Jack-8 | 22–20 | 52.38% |
| William.T.Four vs Claudio | 7–25 | 21.88% |
| William.T.Four vs Kuma | 7–23 | 23.33% |
| William.T.Four vs Anna | 12–13 | 48.00% |
| William.T.Four vs Armor King | 5–19 | 20.83% |
| William.T.Four vs Fahkumram | 3–15 | 16.67% |
| William.T.Four vs Shaheen | 9–7 | 56.25% |
| William.T.Four vs Panda | 4–11 | 26.67% |
| William.T.Four vs Zafina | 8–7 | 53.33% |
| William.T.Four vs Miary Zo | 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.