| Sampei vs Hwoarang | 17–4 | 80.95% |
| Sampei vs Reina | 16–4 | 80.00% |
| Sampei vs Kazuya | 15–1 | 93.75% |
| Sampei vs Law | 14–1 | 93.33% |
| Sampei vs Jin | 6–8 | 42.86% |
| Sampei vs Lili | 8–5 | 61.54% |
| Sampei vs Steve | 12–0 | 100.00% |
| Sampei vs Victor | 6–5 | 54.55% |
| Sampei vs King | 9–1 | 90.00% |
| Sampei vs Yoshimitsu | 9–0 | 100.00% |
| Sampei vs Heihachi | 7–2 | 77.78% |
| Sampei vs Jun | 6–2 | 75.00% |
| Sampei vs Azucena | 7–1 | 87.50% |
| Sampei vs Asuka | 5–2 | 71.43% |
| Sampei vs Nina | 7–0 | 100.00% |
| Sampei vs Leo | 3–3 | 50.00% |
| Sampei vs Xiaoyu | 4–1 | 80.00% |
| Sampei vs Bryan | 4–1 | 80.00% |
| Sampei vs Feng | 3–2 | 60.00% |
| Sampei vs Alisa | 3–2 | 60.00% |
| Sampei vs Eddy | 4–1 | 80.00% |
| Sampei vs Lars | 4–0 | 100.00% |
| Sampei vs Claudio | 4–0 | 100.00% |
| Sampei vs Lidia | 4–0 | 100.00% |
| Sampei vs Paul | 3–0 | 100.00% |
| Sampei vs Jack-8 | 3–0 | 100.00% |
| Sampei vs Dragunov | 3–0 | 100.00% |
| Sampei vs Lee | 3–0 | 100.00% |
| Sampei vs Raven | 1–2 | 33.33% |
| Sampei vs Devil Jin | 2–0 | 100.00% |
| Sampei vs Shaheen | 2–0 | 100.00% |
| Sampei vs Panda | 0–2 | 0.00% |
| Sampei vs Zafina | 2–0 | 100.00% |
| Sampei vs Leroy | 2–0 | 100.00% |
| Sampei vs Clive | 0–2 | 0.00% |
| Sampei vs Kuma | 1–0 | 100.00% |
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.