| King Roman vs King | 15–21 | 41.67% |
| King Roman vs Hwoarang | 9–15 | 37.50% |
| King Roman vs Kazuya | 12–11 | 52.17% |
| King Roman vs Jin | 8–14 | 36.36% |
| King Roman vs Dragunov | 4–16 | 20.00% |
| King Roman vs Yoshimitsu | 9–6 | 60.00% |
| King Roman vs Reina | 9–6 | 60.00% |
| King Roman vs Steve | 4–7 | 36.36% |
| King Roman vs Lars | 3–7 | 30.00% |
| King Roman vs Claudio | 5–5 | 50.00% |
| King Roman vs Jun | 7–3 | 70.00% |
| King Roman vs Lili | 4–4 | 50.00% |
| King Roman vs Lee | 4–4 | 50.00% |
| King Roman vs Victor | 4–4 | 50.00% |
| King Roman vs Law | 5–2 | 71.43% |
| King Roman vs Bryan | 2–5 | 28.57% |
| King Roman vs Jack-8 | 0–7 | 0.00% |
| King Roman vs Devil Jin | 1–6 | 14.29% |
| King Roman vs Shaheen | 1–6 | 14.29% |
| King Roman vs Feng | 2–4 | 33.33% |
| King Roman vs Eddy | 1–4 | 20.00% |
| King Roman vs Xiaoyu | 2–2 | 50.00% |
| King Roman vs Alisa | 3–1 | 75.00% |
| King Roman vs Azucena | 1–3 | 25.00% |
| King Roman vs Raven | 2–2 | 50.00% |
| King Roman vs Paul | 1–2 | 33.33% |
| King Roman vs Asuka | 1–2 | 33.33% |
| King Roman vs Nina | 1–2 | 33.33% |
| King Roman vs Leroy | 2–1 | 66.67% |
| King Roman vs Leo | 2–0 | 100.00% |
| King Roman vs Lidia | 2–0 | 100.00% |
| King Roman 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.