| Posiedon vs Reina | 33–29 | 53.23% |
| Posiedon vs Jin | 13–38 | 25.49% |
| Posiedon vs Kazuya | 25–26 | 49.02% |
| Posiedon vs King | 26–23 | 53.06% |
| Posiedon vs Eddy | 8–28 | 22.22% |
| Posiedon vs Hwoarang | 14–20 | 41.18% |
| Posiedon vs Asuka | 13–18 | 41.94% |
| Posiedon vs Lars | 12–19 | 38.71% |
| Posiedon vs Victor | 13–15 | 46.43% |
| Posiedon vs Paul | 10–17 | 37.04% |
| Posiedon vs Bryan | 12–15 | 44.44% |
| Posiedon vs Nina | 16–10 | 61.54% |
| Posiedon vs Azucena | 12–14 | 46.15% |
| Posiedon vs Law | 6–18 | 25.00% |
| Posiedon vs Lili | 14–10 | 58.33% |
| Posiedon vs Steve | 14–9 | 60.87% |
| Posiedon vs Dragunov | 11–7 | 61.11% |
| Posiedon vs Jun | 10–7 | 58.82% |
| Posiedon vs Xiaoyu | 7–9 | 43.75% |
| Posiedon vs Lee | 9–7 | 56.25% |
| Posiedon vs Clive | 10–6 | 62.50% |
| Posiedon vs Yoshimitsu | 4–10 | 28.57% |
| Posiedon vs Leroy | 4–8 | 33.33% |
| Posiedon vs Heihachi | 6–5 | 54.55% |
| Posiedon vs Devil Jin | 3–4 | 42.86% |
| Posiedon vs Alisa | 1–5 | 16.67% |
| Posiedon vs Jack-8 | 2–3 | 40.00% |
| Posiedon vs Leo | 1–4 | 20.00% |
| Posiedon vs Kuma | 3–2 | 60.00% |
| Posiedon vs Feng | 1–3 | 25.00% |
| Posiedon vs Claudio | 4–0 | 100.00% |
| Posiedon vs Shaheen | 0–3 | 0.00% |
| Posiedon vs Panda | 1–2 | 33.33% |
| Posiedon vs Raven | 2–1 | 66.67% |
| Posiedon vs Zafina | 2–0 | 100.00% |
| Posiedon vs Lidia | 0–2 | 0.00% |
| Posiedon vs Anna | 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.