| River vs Kazuya | 21–12 | 63.64% |
| River vs Paul | 12–14 | 46.15% |
| River vs Hwoarang | 14–12 | 53.85% |
| River vs Jin | 12–14 | 46.15% |
| River vs Jun | 15–11 | 57.69% |
| River vs Bryan | 13–12 | 52.00% |
| River vs Yoshimitsu | 8–13 | 38.10% |
| River vs King | 14–6 | 70.00% |
| River vs Alisa | 9–9 | 50.00% |
| River vs Dragunov | 13–4 | 76.47% |
| River vs Reina | 9–8 | 52.94% |
| River vs Feng | 6–9 | 40.00% |
| River vs Kuma | 7–7 | 50.00% |
| River vs Steve | 8–3 | 72.73% |
| River vs Lili | 9–2 | 81.82% |
| River vs Victor | 7–4 | 63.64% |
| River vs Law | 8–2 | 80.00% |
| River vs Devil Jin | 5–4 | 55.56% |
| River vs Eddy | 5–4 | 55.56% |
| River vs Heihachi | 5–4 | 55.56% |
| River vs Asuka | 6–2 | 75.00% |
| River vs Xiaoyu | 4–3 | 57.14% |
| River vs Leroy | 4–3 | 57.14% |
| River vs Leo | 5–1 | 83.33% |
| River vs Claudio | 6–0 | 100.00% |
| River vs Azucena | 4–2 | 66.67% |
| River vs Lars | 3–2 | 60.00% |
| River vs Panda | 1–3 | 25.00% |
| River vs Lidia | 2–1 | 66.67% |
| River vs Clive | 2–1 | 66.67% |
| River vs Jack-8 | 0–2 | 0.00% |
| River vs Nina | 2–0 | 100.00% |
| River vs Zafina | 0–2 | 0.00% |
| River vs Lee | 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.