| Williamscel vs Kazuya | 103–81 | 55.98% |
| Williamscel vs King | 105–64 | 62.13% |
| Williamscel vs Bryan | 83–81 | 50.61% |
| Williamscel vs Jin | 79–76 | 50.97% |
| Williamscel vs Steve | 87–53 | 62.14% |
| Williamscel vs Hwoarang | 64–71–1 | 47.41% |
| Williamscel vs Law | 69–63 | 52.27% |
| Williamscel vs Clive | 67–58 | 53.60% |
| Williamscel vs Reina | 67–47 | 58.77% |
| Williamscel vs Eddy | 54–54 | 50.00% |
| Williamscel vs Dragunov | 60–36 | 62.50% |
| Williamscel vs Yoshimitsu | 53–36 | 59.55% |
| Williamscel vs Jun | 58–30 | 65.91% |
| Williamscel vs Lili | 49–34 | 59.04% |
| Williamscel vs Paul | 43–38 | 53.09% |
| Williamscel vs Azucena | 36–40 | 47.37% |
| Williamscel vs Lee | 41–32 | 56.16% |
| Williamscel vs Heihachi | 39–34 | 53.42% |
| Williamscel vs Victor | 39–27 | 59.09% |
| Williamscel vs Feng | 27–33 | 45.00% |
| Williamscel vs Armor King | 28–32 | 46.67% |
| Williamscel vs Asuka | 23–36 | 38.98% |
| Williamscel vs Lars | 30–29 | 50.85% |
| Williamscel vs Lidia | 27–28 | 49.09% |
| Williamscel vs Devil Jin | 23–31 | 42.59% |
| Williamscel vs Raven | 32–20 | 61.54% |
| Williamscel vs Nina | 27–24 | 52.94% |
| Williamscel vs Jack-8 | 30–18 | 62.50% |
| Williamscel vs Leo | 22–24 | 47.83% |
| Williamscel vs Alisa | 23–22 | 51.11% |
| Williamscel vs Fahkumram | 19–25 | 43.18% |
| Williamscel vs Leroy | 18–21 | 46.15% |
| Williamscel vs Xiaoyu | 20–18 | 52.63% |
| Williamscel vs Miary Zo | 19–11 | 63.33% |
| Williamscel vs Claudio | 12–17 | 41.38% |
| Williamscel vs Zafina | 12–10 | 54.55% |
| Williamscel vs Anna | 8–12 | 40.00% |
| Williamscel vs Shaheen | 7–6 | 53.85% |
| Williamscel vs Panda | 5–8 | 38.46% |
| Williamscel vs Kuma | 4–6 | 40.00% |
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.