| Piraña vs Hwoarang | 20–13 | 60.61% |
| Piraña vs Heihachi | 10–16 | 38.46% |
| Piraña vs Jin | 7–16 | 30.43% |
| Piraña vs King | 11–10 | 52.38% |
| Piraña vs Steve | 9–12 | 42.86% |
| Piraña vs Lidia | 7–14 | 33.33% |
| Piraña vs Lee | 15–4 | 78.95% |
| Piraña vs Reina | 11–8 | 57.89% |
| Piraña vs Bryan | 11–7 | 61.11% |
| Piraña vs Kazuya | 9–6 | 60.00% |
| Piraña vs Yoshimitsu | 7–7 | 50.00% |
| Piraña vs Kuma | 2–11 | 15.38% |
| Piraña vs Law | 7–4 | 63.64% |
| Piraña vs Lili | 6–5 | 54.55% |
| Piraña vs Lars | 7–4 | 63.64% |
| Piraña vs Asuka | 2–8 | 20.00% |
| Piraña vs Devil Jin | 5–5 | 50.00% |
| Piraña vs Victor | 5–5 | 50.00% |
| Piraña vs Eddy | 2–8 | 20.00% |
| Piraña vs Jun | 7–2 | 77.78% |
| Piraña vs Paul | 4–3 | 57.14% |
| Piraña vs Xiaoyu | 3–3 | 50.00% |
| Piraña vs Azucena | 6–0 | 100.00% |
| Piraña vs Dragunov | 3–2 | 60.00% |
| Piraña vs Claudio | 3–1 | 75.00% |
| Piraña vs Nina | 3–1 | 75.00% |
| Piraña vs Jack-8 | 1–2 | 33.33% |
| Piraña vs Feng | 3–0 | 100.00% |
| Piraña vs Leo | 1–2 | 33.33% |
| Piraña vs Panda | 1–2 | 33.33% |
| Piraña vs Zafina | 2–1 | 66.67% |
| Piraña vs Anna | 2–1 | 66.67% |
| Piraña vs Alisa | 1–1 | 50.00% |
| Piraña vs Miary Zo | 2–0 | 100.00% |
| Piraña vs Raven | 1–0 | 100.00% |
| Piraña vs Armor King | 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.