| Charles Kay vs Law | 7–5 | 58.33% |
| Charles Kay vs Hwoarang | 11–0 | 100.00% |
| Charles Kay vs Jun | 7–3 | 70.00% |
| Charles Kay vs Bryan | 4–4 | 50.00% |
| Charles Kay vs King | 1–4 | 20.00% |
| Charles Kay vs Steve | 5–0 | 100.00% |
| Charles Kay vs Lili | 4–1 | 80.00% |
| Charles Kay vs Reina | 4–1 | 80.00% |
| Charles Kay vs Victor | 3–2 | 60.00% |
| Charles Kay vs Raven | 2–2 | 50.00% |
| Charles Kay vs Yoshimitsu | 3–0 | 100.00% |
| Charles Kay vs Jin | 2–1 | 66.67% |
| Charles Kay vs Kazuya | 3–0 | 100.00% |
| Charles Kay vs Devil Jin | 1–2 | 33.33% |
| Charles Kay vs Claudio | 3–0 | 100.00% |
| Charles Kay vs Lee | 1–2 | 33.33% |
| Charles Kay vs Xiaoyu | 2–0 | 100.00% |
| Charles Kay vs Dragunov | 2–0 | 100.00% |
| Charles Kay vs Lars | 2–0 | 100.00% |
| Charles Kay vs Leroy | 0–2 | 0.00% |
| Charles Kay vs Azucena | 1–1 | 50.00% |
| Charles Kay vs Eddy | 2–0 | 100.00% |
| Charles Kay vs Fahkumram | 2–0 | 100.00% |
| Charles Kay vs Paul | 1–0 | 100.00% |
| Charles Kay vs Jack-8 | 0–1 | 0.00% |
| Charles Kay vs Asuka | 0–1 | 0.00% |
| Charles Kay vs Feng | 1–0 | 100.00% |
| Charles Kay vs Kuma | 1–0 | 100.00% |
| Charles Kay vs Lidia | 1–0 | 100.00% |
| Charles Kay vs Heihachi | 1–0 | 100.00% |
| Charles Kay vs Clive | 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.