| RomanOsirus vs King | 76–86 | 46.91% |
| RomanOsirus vs Law | 57–73 | 43.85% |
| RomanOsirus vs Jin | 56–63 | 47.06% |
| RomanOsirus vs Hwoarang | 55–62 | 47.01% |
| RomanOsirus vs Steve | 55–48 | 53.40% |
| RomanOsirus vs Kazuya | 35–57 | 38.04% |
| RomanOsirus vs Bryan | 25–51 | 32.89% |
| RomanOsirus vs Jun | 38–38 | 50.00% |
| RomanOsirus vs Reina | 30–45 | 40.00% |
| RomanOsirus vs Lili | 30–43 | 41.10% |
| RomanOsirus vs Azucena | 30–41 | 42.25% |
| RomanOsirus vs Yoshimitsu | 42–26 | 61.76% |
| RomanOsirus vs Dragunov | 32–29 | 52.46% |
| RomanOsirus vs Asuka | 28–27 | 50.91% |
| RomanOsirus vs Raven | 27–25 | 51.92% |
| RomanOsirus vs Lars | 28–23 | 54.90% |
| RomanOsirus vs Eddy | 32–19 | 62.75% |
| RomanOsirus vs Fahkumram | 23–27 | 46.00% |
| RomanOsirus vs Victor | 23–25 | 47.92% |
| RomanOsirus vs Paul | 18–25 | 41.86% |
| RomanOsirus vs Leo | 20–20 | 50.00% |
| RomanOsirus vs Nina | 15–25 | 37.50% |
| RomanOsirus vs Lee | 17–23 | 42.50% |
| RomanOsirus vs Xiaoyu | 18–20 | 47.37% |
| RomanOsirus vs Devil Jin | 17–21 | 44.74% |
| RomanOsirus vs Lidia | 22–16 | 57.89% |
| RomanOsirus vs Anna | 17–21 | 44.74% |
| RomanOsirus vs Heihachi | 17–19 | 47.22% |
| RomanOsirus vs Leroy | 21–14 | 60.00% |
| RomanOsirus vs Armor King | 20–15 | 57.14% |
| RomanOsirus vs Jack-8 | 12–16 | 42.86% |
| RomanOsirus vs Alisa | 6–17 | 26.09% |
| RomanOsirus vs Feng | 8–14 | 36.36% |
| RomanOsirus vs Kuma | 9–11 | 45.00% |
| RomanOsirus vs Claudio | 3–14 | 17.65% |
| RomanOsirus vs Clive | 7–7 | 50.00% |
| RomanOsirus vs Miary Zo | 8–6 | 57.14% |
| RomanOsirus vs Zafina | 7–5 | 58.33% |
| RomanOsirus vs Shaheen | 5–4 | 55.56% |
| RomanOsirus vs Panda | 0–5 | 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.