| Ruiz vs King | 35–39 | 47.30% |
| Ruiz vs Steve | 31–30 | 50.82% |
| Ruiz vs Jin | 33–21 | 61.11% |
| Ruiz vs Kazuya | 16–38 | 29.63% |
| Ruiz vs Hwoarang | 20–28 | 41.67% |
| Ruiz vs Reina | 24–21 | 53.33% |
| Ruiz vs Bryan | 18–18 | 50.00% |
| Ruiz vs Law | 20–14 | 58.82% |
| Ruiz vs Heihachi | 9–25 | 26.47% |
| Ruiz vs Lili | 20–13 | 60.61% |
| Ruiz vs Jun | 17–15 | 53.12% |
| Ruiz vs Paul | 11–13 | 45.83% |
| Ruiz vs Yoshimitsu | 3–21 | 12.50% |
| Ruiz vs Dragunov | 10–14 | 41.67% |
| Ruiz vs Asuka | 7–16 | 30.43% |
| Ruiz vs Eddy | 7–16 | 30.43% |
| Ruiz vs Armor King | 9–11 | 45.00% |
| Ruiz vs Devil Jin | 11–8 | 57.89% |
| Ruiz vs Azucena | 10–9 | 52.63% |
| Ruiz vs Anna | 10–9 | 52.63% |
| Ruiz vs Alisa | 11–7 | 61.11% |
| Ruiz vs Nina | 8–10 | 44.44% |
| Ruiz vs Clive | 8–8 | 50.00% |
| Ruiz vs Xiaoyu | 4–10 | 28.57% |
| Ruiz vs Kuma | 6–7 | 46.15% |
| Ruiz vs Jack-8 | 5–6 | 45.45% |
| Ruiz vs Claudio | 5–6 | 45.45% |
| Ruiz vs Leroy | 5–6 | 45.45% |
| Ruiz vs Fahkumram | 5–6 | 45.45% |
| Ruiz vs Leo | 1–9 | 10.00% |
| Ruiz vs Shaheen | 7–3 | 70.00% |
| Ruiz vs Lee | 3–6 | 33.33% |
| Ruiz vs Zafina | 4–4 | 50.00% |
| Ruiz vs Lidia | 2–5 | 28.57% |
| Ruiz vs Feng | 3–3 | 50.00% |
| Ruiz vs Miary Zo | 1–5 | 16.67% |
| Ruiz vs Raven | 3–2 | 60.00% |
| Ruiz vs Lars | 1–2 | 33.33% |
| Ruiz vs Victor | 2–1 | 66.67% |
| Ruiz vs Panda | 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.