| OldSerpent vs Jin | 49–58 | 45.79% |
| OldSerpent vs Bryan | 37–54 | 40.66% |
| OldSerpent vs King | 40–45 | 47.06% |
| OldSerpent vs Reina | 34–45 | 43.04% |
| OldSerpent vs Eddy | 42–35 | 54.55% |
| OldSerpent vs Dragunov | 30–43 | 41.10% |
| OldSerpent vs Kazuya | 34–30 | 53.12% |
| OldSerpent vs Law | 31–31 | 50.00% |
| OldSerpent vs Steve | 34–27 | 55.74% |
| OldSerpent vs Hwoarang | 23–32 | 41.82% |
| OldSerpent vs Azucena | 30–21 | 58.82% |
| OldSerpent vs Asuka | 23–23 | 50.00% |
| OldSerpent vs Lars | 20–26 | 43.48% |
| OldSerpent vs Jun | 20–26 | 43.48% |
| OldSerpent vs Lili | 19–25 | 43.18% |
| OldSerpent vs Paul | 22–20 | 52.38% |
| OldSerpent vs Yoshimitsu | 16–26 | 38.10% |
| OldSerpent vs Victor | 30–12 | 71.43% |
| OldSerpent vs Heihachi | 15–25 | 37.50% |
| OldSerpent vs Devil Jin | 14–20 | 41.18% |
| OldSerpent vs Nina | 13–20 | 39.39% |
| OldSerpent vs Lee | 13–20 | 39.39% |
| OldSerpent vs Xiaoyu | 9–19 | 32.14% |
| OldSerpent vs Jack-8 | 12–15 | 44.44% |
| OldSerpent vs Lidia | 7–19 | 26.92% |
| OldSerpent vs Feng | 10–15 | 40.00% |
| OldSerpent vs Alisa | 11–14 | 44.00% |
| OldSerpent vs Leroy | 6–19 | 24.00% |
| OldSerpent vs Raven | 13–12 | 52.00% |
| OldSerpent vs Leo | 7–9 | 43.75% |
| OldSerpent vs Kuma | 10–6 | 62.50% |
| OldSerpent vs Shaheen | 6–8 | 42.86% |
| OldSerpent vs Panda | 4–4 | 50.00% |
| OldSerpent vs Zafina | 4–2 | 66.67% |
| OldSerpent vs Claudio | 2–3 | 40.00% |
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.