| Kay_Will vs Law | 2–2 | 50.00% |
| Kay_Will vs Jun | 0–4 | 0.00% |
| Kay_Will vs Paul | 1–2 | 33.33% |
| Kay_Will vs King | 0–3 | 0.00% |
| Kay_Will vs Kazuya | 1–2 | 33.33% |
| Kay_Will vs Feng | 2–1 | 66.67% |
| Kay_Will vs Jin | 1–1 | 50.00% |
| Kay_Will vs Lili | 1–1 | 50.00% |
| Kay_Will vs Leo | 0–2 | 0.00% |
| Kay_Will vs Reina | 2–0 | 100.00% |
| Kay_Will vs Yoshimitsu | 0–1 | 0.00% |
| Kay_Will vs Devil Jin | 1–0 | 100.00% |
| Kay_Will vs Alisa | 0–1 | 0.00% |
| Kay_Will vs Kuma | 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.