| Ruler21 vs Jin | 21–18 | 53.85% |
| Ruler21 vs King | 22–14 | 61.11% |
| Ruler21 vs Bryan | 14–15 | 48.28% |
| Ruler21 vs Kazuya | 21–8 | 72.41% |
| Ruler21 vs Eddy | 12–17 | 41.38% |
| Ruler21 vs Lili | 15–13 | 53.57% |
| Ruler21 vs Steve | 12–14 | 46.15% |
| Ruler21 vs Hwoarang | 12–11 | 52.17% |
| Ruler21 vs Asuka | 10–12 | 45.45% |
| Ruler21 vs Reina | 9–13 | 40.91% |
| Ruler21 vs Azucena | 7–13 | 35.00% |
| Ruler21 vs Law | 10–8 | 55.56% |
| Ruler21 vs Paul | 7–10 | 41.18% |
| Ruler21 vs Dragunov | 7–10 | 41.18% |
| Ruler21 vs Victor | 9–8 | 52.94% |
| Ruler21 vs Yoshimitsu | 7–8 | 46.67% |
| Ruler21 vs Alisa | 7–8 | 46.67% |
| Ruler21 vs Raven | 5–8 | 38.46% |
| Ruler21 vs Xiaoyu | 8–4 | 66.67% |
| Ruler21 vs Lars | 6–4 | 60.00% |
| Ruler21 vs Jack-8 | 1–8 | 11.11% |
| Ruler21 vs Claudio | 3–6 | 33.33% |
| Ruler21 vs Shaheen | 5–4 | 55.56% |
| Ruler21 vs Kuma | 4–5 | 44.44% |
| Ruler21 vs Leo | 6–2 | 75.00% |
| Ruler21 vs Zafina | 4–4 | 50.00% |
| Ruler21 vs Devil Jin | 5–2 | 71.43% |
| Ruler21 vs Jun | 3–4 | 42.86% |
| Ruler21 vs Lee | 3–3 | 50.00% |
| Ruler21 vs Heihachi | 2–4 | 33.33% |
| Ruler21 vs Feng | 4–1 | 80.00% |
| Ruler21 vs Nina | 2–3 | 40.00% |
| Ruler21 vs Panda | 0–2 | 0.00% |
| Ruler21 vs Leroy | 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.