| WilliamWatson vs Kazuya | 54–32 | 62.79% |
| WilliamWatson vs Jin | 57–13 | 81.43% |
| WilliamWatson vs King | 56–13 | 81.16% |
| WilliamWatson vs Reina | 43–16 | 72.88% |
| WilliamWatson vs Dragunov | 36–18 | 66.67% |
| WilliamWatson vs Steve | 28–16 | 63.64% |
| WilliamWatson vs Bryan | 27–16 | 62.79% |
| WilliamWatson vs Law | 27–15 | 64.29% |
| WilliamWatson vs Hwoarang | 27–11 | 71.05% |
| WilliamWatson vs Devil Jin | 21–11 | 65.62% |
| WilliamWatson vs Heihachi | 20–11 | 64.52% |
| WilliamWatson vs Paul | 17–11 | 60.71% |
| WilliamWatson vs Lili | 15–12 | 55.56% |
| WilliamWatson vs Lee | 19–8 | 70.37% |
| WilliamWatson vs Jun | 11–13 | 45.83% |
| WilliamWatson vs Yoshimitsu | 9–13 | 40.91% |
| WilliamWatson vs Leo | 14–6 | 70.00% |
| WilliamWatson vs Asuka | 9–9 | 50.00% |
| WilliamWatson vs Feng | 10–8 | 55.56% |
| WilliamWatson vs Kuma | 13–5 | 72.22% |
| WilliamWatson vs Leroy | 15–3 | 83.33% |
| WilliamWatson vs Eddy | 7–11 | 38.89% |
| WilliamWatson vs Claudio | 8–8 | 50.00% |
| WilliamWatson vs Alisa | 6–7 | 46.15% |
| WilliamWatson vs Jack-8 | 7–5 | 58.33% |
| WilliamWatson vs Clive | 7–5 | 58.33% |
| WilliamWatson vs Nina | 8–2 | 80.00% |
| WilliamWatson vs Miary Zo | 5–4 | 55.56% |
| WilliamWatson vs Victor | 5–2 | 71.43% |
| WilliamWatson vs Anna | 4–3 | 57.14% |
| WilliamWatson vs Xiaoyu | 4–2 | 66.67% |
| WilliamWatson vs Lars | 4–2 | 66.67% |
| WilliamWatson vs Azucena | 3–2 | 60.00% |
| WilliamWatson vs Fahkumram | 0–5 | 0.00% |
| WilliamWatson vs Armor King | 2–3 | 40.00% |
| WilliamWatson vs Panda | 2–1 | 66.67% |
| WilliamWatson vs Zafina | 0–2 | 0.00% |
| WilliamWatson vs Raven | 1–1 | 50.00% |
| WilliamWatson vs Lidia | 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.