| Mark Romain vs Jin | 9–2 | 81.82% |
| Mark Romain vs Hwoarang | 3–4 | 42.86% |
| Mark Romain vs Law | 3–3 | 50.00% |
| Mark Romain vs Steve | 3–3 | 50.00% |
| Mark Romain vs Reina | 3–3 | 50.00% |
| Mark Romain vs Kazuya | 3–2 | 60.00% |
| Mark Romain vs Eddy | 3–2 | 60.00% |
| Mark Romain vs Devil Jin | 1–3 | 25.00% |
| Mark Romain vs Lili | 2–2 | 50.00% |
| Mark Romain vs King | 2–1 | 66.67% |
| Mark Romain vs Dragunov | 1–2 | 33.33% |
| Mark Romain vs Alisa | 2–1 | 66.67% |
| Mark Romain vs Lee | 3–0 | 100.00% |
| Mark Romain vs Raven | 2–1 | 66.67% |
| Mark Romain vs Miary Zo | 1–2 | 33.33% |
| Mark Romain vs Feng | 1–1 | 50.00% |
| Mark Romain vs Lars | 2–0 | 100.00% |
| Mark Romain vs Leroy | 1–1 | 50.00% |
| Mark Romain vs Azucena | 2–0 | 100.00% |
| Mark Romain vs Victor | 2–0 | 100.00% |
| Mark Romain vs Heihachi | 0–2 | 0.00% |
| Mark Romain vs Paul | 0–1 | 0.00% |
| Mark Romain vs Xiaoyu | 1–0 | 100.00% |
| Mark Romain vs Bryan | 0–1 | 0.00% |
| Mark Romain vs Nina | 1–0 | 100.00% |
| Mark Romain vs Kuma | 1–0 | 100.00% |
| Mark Romain vs Zafina | 1–0 | 100.00% |
| Mark Romain vs Jun | 1–0 | 100.00% |
| Mark Romain vs Clive | 0–1 | 0.00% |
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.