| Ronaldo vs Hwoarang | 7–2 | 77.78% |
| Ronaldo vs Law | 2–5 | 28.57% |
| Ronaldo vs King | 4–2 | 66.67% |
| Ronaldo vs Victor | 6–0 | 100.00% |
| Ronaldo vs Eddy | 3–3 | 50.00% |
| Ronaldo vs Alisa | 2–3 | 40.00% |
| Ronaldo vs Jin | 1–3 | 25.00% |
| Ronaldo vs Devil Jin | 1–2 | 33.33% |
| Ronaldo vs Lars | 3–0 | 100.00% |
| Ronaldo vs Xiaoyu | 1–1 | 50.00% |
| Ronaldo vs Bryan | 2–0 | 100.00% |
| Ronaldo vs Kazuya | 1–1 | 50.00% |
| Ronaldo vs Jack-8 | 1–1 | 50.00% |
| Ronaldo vs Lili | 0–2 | 0.00% |
| Ronaldo vs Dragunov | 2–0 | 100.00% |
| Ronaldo vs Zafina | 1–1 | 50.00% |
| Ronaldo vs Azucena | 1–1 | 50.00% |
| Ronaldo vs Steve | 1–0 | 100.00% |
| Ronaldo vs Asuka | 1–0 | 100.00% |
| Ronaldo vs Feng | 1–0 | 100.00% |
| Ronaldo vs Claudio | 1–0 | 100.00% |
| Ronaldo vs Nina | 0–1 | 0.00% |
| Ronaldo vs Leroy | 1–0 | 100.00% |
| Ronaldo vs Reina | 1–0 | 100.00% |
| Ronaldo vs Lidia | 1–0 | 100.00% |
| Ronaldo vs Heihachi | 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.