| Viper vs King | 18–10 | 64.29% |
| Viper vs Yoshimitsu | 12–9 | 57.14% |
| Viper vs Bryan | 13–7 | 65.00% |
| Viper vs Kazuya | 11–5 | 68.75% |
| Viper vs Dragunov | 6–10 | 37.50% |
| Viper vs Reina | 8–8 | 50.00% |
| Viper vs Eddy | 8–8 | 50.00% |
| Viper vs Law | 5–10 | 33.33% |
| Viper vs Lars | 9–6 | 60.00% |
| Viper vs Jun | 9–6 | 60.00% |
| Viper vs Azucena | 9–6 | 60.00% |
| Viper vs Steve | 7–6 | 53.85% |
| Viper vs Lili | 7–6 | 53.85% |
| Viper vs Jin | 7–5 | 58.33% |
| Viper vs Paul | 5–6 | 45.45% |
| Viper vs Jack-8 | 3–8 | 27.27% |
| Viper vs Asuka | 3–8 | 27.27% |
| Viper vs Feng | 7–4 | 63.64% |
| Viper vs Raven | 5–4 | 55.56% |
| Viper vs Hwoarang | 3–5 | 37.50% |
| Viper vs Devil Jin | 4–4 | 50.00% |
| Viper vs Leo | 4–4 | 50.00% |
| Viper vs Alisa | 4–4 | 50.00% |
| Viper vs Kuma | 3–5 | 37.50% |
| Viper vs Leroy | 3–4 | 42.86% |
| Viper vs Victor | 2–5 | 28.57% |
| Viper vs Shaheen | 4–2 | 66.67% |
| Viper vs Zafina | 4–1 | 80.00% |
| Viper vs Lee | 2–2 | 50.00% |
| Viper vs Claudio | 0–2 | 0.00% |
| Viper vs Nina | 2–0 | 100.00% |
| Viper vs Panda | 0–2 | 0.00% |
| Viper vs Xiaoyu | 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.