| River vs Kazuya | 39–43 | 47.56% |
| River vs Jin | 34–44 | 43.59% |
| River vs King | 38–33 | 53.52% |
| River vs Hwoarang | 34–24 | 58.62% |
| River vs Reina | 24–32 | 42.86% |
| River vs Steve | 18–27 | 40.00% |
| River vs Yoshimitsu | 16–25 | 39.02% |
| River vs Lili | 20–20 | 50.00% |
| River vs Eddy | 17–20 | 45.95% |
| River vs Victor | 17–19 | 47.22% |
| River vs Jun | 13–22 | 37.14% |
| River vs Bryan | 18–16 | 52.94% |
| River vs Dragunov | 17–17 | 50.00% |
| River vs Law | 19–12 | 61.29% |
| River vs Asuka | 13–18 | 41.94% |
| River vs Xiaoyu | 12–18 | 40.00% |
| River vs Alisa | 14–16 | 46.67% |
| River vs Feng | 9–19 | 32.14% |
| River vs Lars | 11–17 | 39.29% |
| River vs Lee | 8–18 | 30.77% |
| River vs Azucena | 7–18 | 28.00% |
| River vs Paul | 9–14 | 39.13% |
| River vs Devil Jin | 9–11 | 45.00% |
| River vs Jack-8 | 7–12 | 36.84% |
| River vs Leo | 6–9 | 40.00% |
| River vs Nina | 6–7 | 46.15% |
| River vs Kuma | 6–7 | 46.15% |
| River vs Claudio | 3–9 | 25.00% |
| River vs Raven | 0–6 | 0.00% |
| River vs Leroy | 2–1 | 66.67% |
| River vs Shaheen | 1–2 | 33.33% |
| River vs Zafina | 0–2 | 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.