| JWsammy vs Hwoarang | 13–20 | 39.39% |
| JWsammy vs Jin | 14–16 | 46.67% |
| JWsammy vs King | 16–13 | 55.17% |
| JWsammy vs Law | 9–12 | 42.86% |
| JWsammy vs Heihachi | 7–14 | 33.33% |
| JWsammy vs Lili | 7–13 | 35.00% |
| JWsammy vs Bryan | 8–9 | 47.06% |
| JWsammy vs Kazuya | 8–9 | 47.06% |
| JWsammy vs Steve | 7–8 | 46.67% |
| JWsammy vs Dragunov | 6–6 | 50.00% |
| JWsammy vs Nina | 4–7 | 36.36% |
| JWsammy vs Eddy | 7–4 | 63.64% |
| JWsammy vs Alisa | 1–8 | 11.11% |
| JWsammy vs Devil Jin | 2–6 | 25.00% |
| JWsammy vs Reina | 3–5 | 37.50% |
| JWsammy vs Azucena | 3–5 | 37.50% |
| JWsammy vs Yoshimitsu | 5–2 | 71.43% |
| JWsammy vs Xiaoyu | 4–3 | 57.14% |
| JWsammy vs Jack-8 | 4–3 | 57.14% |
| JWsammy vs Jun | 4–3 | 57.14% |
| JWsammy vs Victor | 2–5 | 28.57% |
| JWsammy vs Raven | 6–1 | 85.71% |
| JWsammy vs Leroy | 3–3 | 50.00% |
| JWsammy vs Asuka | 2–1 | 66.67% |
| JWsammy vs Lars | 1–2 | 33.33% |
| JWsammy vs Claudio | 3–0 | 100.00% |
| JWsammy vs Leo | 1–1 | 50.00% |
| JWsammy vs Shaheen | 0–1 | 0.00% |
| JWsammy vs Lee | 1–0 | 100.00% |
| JWsammy vs Zafina | 0–1 | 0.00% |
| JWsammy vs Clive | 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.