| Viper vs Heihachi | 25–8 | 75.76% |
| Viper vs King | 13–7 | 65.00% |
| Viper vs Lidia | 10–8 | 55.56% |
| Viper vs Steve | 9–6 | 60.00% |
| Viper vs Jin | 8–4 | 66.67% |
| Viper vs Asuka | 8–4 | 66.67% |
| Viper vs Kazuya | 7–3 | 70.00% |
| Viper vs Lili | 6–3 | 66.67% |
| Viper vs Paul | 5–3 | 62.50% |
| Viper vs Feng | 6–1 | 85.71% |
| Viper vs Azucena | 2–5 | 28.57% |
| Viper vs Law | 3–2 | 60.00% |
| Viper vs Hwoarang | 5–0 | 100.00% |
| Viper vs Bryan | 3–2 | 60.00% |
| Viper vs Leo | 1–4 | 20.00% |
| Viper vs Xiaoyu | 3–1 | 75.00% |
| Viper vs Victor | 2–2 | 50.00% |
| Viper vs Raven | 4–0 | 100.00% |
| Viper vs Jack-8 | 1–2 | 33.33% |
| Viper vs Lars | 1–2 | 33.33% |
| Viper vs Claudio | 2–1 | 66.67% |
| Viper vs Shaheen | 2–1 | 66.67% |
| Viper vs Nina | 3–0 | 100.00% |
| Viper vs Lee | 3–0 | 100.00% |
| Viper vs Zafina | 2–1 | 66.67% |
| Viper vs Jun | 2–1 | 66.67% |
| Viper vs Eddy | 1–2 | 33.33% |
| Viper vs Yoshimitsu | 2–1 | 66.67% |
| Viper vs Reina | 2–1 | 66.67% |
| Viper vs Devil Jin | 2–0 | 100.00% |
| Viper vs Dragunov | 2–0 | 100.00% |
| Viper vs Alisa | 0–2 | 0.00% |
| Viper vs Leroy | 0–2 | 0.00% |
| Viper vs Panda | 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.