| Piper vs Reina | 13–6 | 68.42% |
| Piper vs Kazuya | 10–5 | 66.67% |
| Piper vs Heihachi | 10–5 | 66.67% |
| Piper vs Jin | 9–4 | 69.23% |
| Piper vs Lili | 6–5 | 54.55% |
| Piper vs King | 6–3 | 66.67% |
| Piper vs Law | 5–3 | 62.50% |
| Piper vs Yoshimitsu | 5–3 | 62.50% |
| Piper vs Hwoarang | 7–1 | 87.50% |
| Piper vs Bryan | 7–1 | 87.50% |
| Piper vs Jun | 5–3 | 62.50% |
| Piper vs Asuka | 4–3 | 57.14% |
| Piper vs Dragunov | 7–0 | 100.00% |
| Piper vs Kuma | 6–1 | 85.71% |
| Piper vs Shaheen | 4–2 | 66.67% |
| Piper vs Lidia | 6–0 | 100.00% |
| Piper vs Victor | 4–1 | 80.00% |
| Piper vs Feng | 4–0 | 100.00% |
| Piper vs Azucena | 3–1 | 75.00% |
| Piper vs Xiaoyu | 2–1 | 66.67% |
| Piper vs Claudio | 2–1 | 66.67% |
| Piper vs Zafina | 3–0 | 100.00% |
| Piper vs Steve | 0–2 | 0.00% |
| Piper vs Lars | 2–0 | 100.00% |
| Piper vs Raven | 2–0 | 100.00% |
| Piper vs Eddy | 2–0 | 100.00% |
| Piper vs Devil Jin | 1–0 | 100.00% |
| Piper vs Alisa | 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.