| Day-Kay vs Eddy | 2–15 | 11.76% |
| Day-Kay vs King | 7–8 | 46.67% |
| Day-Kay vs Reina | 3–12 | 20.00% |
| Day-Kay vs Victor | 5–10 | 33.33% |
| Day-Kay vs Jin | 7–6 | 53.85% |
| Day-Kay vs Law | 7–4 | 63.64% |
| Day-Kay vs Xiaoyu | 7–2 | 77.78% |
| Day-Kay vs Paul | 2–6 | 25.00% |
| Day-Kay vs Steve | 4–4 | 50.00% |
| Day-Kay vs Lili | 5–3 | 62.50% |
| Day-Kay vs Lars | 1–6 | 14.29% |
| Day-Kay vs Hwoarang | 2–4 | 33.33% |
| Day-Kay vs Alisa | 6–0 | 100.00% |
| Day-Kay vs Nina | 2–4 | 33.33% |
| Day-Kay vs Lee | 2–4 | 33.33% |
| Day-Kay vs Panda | 2–4 | 33.33% |
| Day-Kay vs Asuka | 2–2 | 50.00% |
| Day-Kay vs Dragunov | 2–2 | 50.00% |
| Day-Kay vs Azucena | 2–2 | 50.00% |
| Day-Kay vs Yoshimitsu | 0–3 | 0.00% |
| Day-Kay vs Jack-8 | 1–2 | 33.33% |
| Day-Kay vs Devil Jin | 1–2 | 33.33% |
| Day-Kay vs Feng | 2–1 | 66.67% |
| Day-Kay vs Jun | 2–1 | 66.67% |
| Day-Kay vs Raven | 2–1 | 66.67% |
| Day-Kay vs Kazuya | 2–0 | 100.00% |
| Day-Kay vs Claudio | 0–2 | 0.00% |
| Day-Kay vs Shaheen | 0–2 | 0.00% |
| Day-Kay vs Kuma | 1–1 | 50.00% |
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.