| Piero vs Reina | 10–7 | 58.82% |
| Piero vs Yoshimitsu | 6–4 | 60.00% |
| Piero vs Jin | 4–5 | 44.44% |
| Piero vs Eddy | 5–3 | 62.50% |
| Piero vs Kazuya | 4–3 | 57.14% |
| Piero vs King | 4–2 | 66.67% |
| Piero vs Law | 1–4 | 20.00% |
| Piero vs Hwoarang | 0–5 | 0.00% |
| Piero vs Lili | 3–2 | 60.00% |
| Piero vs Paul | 2–2 | 50.00% |
| Piero vs Jack-8 | 4–0 | 100.00% |
| Piero vs Kuma | 2–2 | 50.00% |
| Piero vs Jun | 2–2 | 50.00% |
| Piero vs Azucena | 3–1 | 75.00% |
| Piero vs Xiaoyu | 2–1 | 66.67% |
| Piero vs Bryan | 2–1 | 66.67% |
| Piero vs Dragunov | 2–1 | 66.67% |
| Piero vs Lars | 2–1 | 66.67% |
| Piero vs Steve | 1–1 | 50.00% |
| Piero vs Asuka | 2–0 | 100.00% |
| Piero vs Devil Jin | 1–1 | 50.00% |
| Piero vs Leo | 2–0 | 100.00% |
| Piero vs Nina | 2–0 | 100.00% |
| Piero vs Zafina | 1–1 | 50.00% |
| Piero vs Claudio | 1–0 | 100.00% |
| Piero vs Victor | 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.