| JustOnce vs Reina | 33–31 | 51.56% |
| JustOnce vs Kazuya | 27–36 | 42.86% |
| JustOnce vs Dragunov | 24–34 | 41.38% |
| JustOnce vs Lili | 19–30 | 38.78% |
| JustOnce vs Jin | 13–32 | 28.89% |
| JustOnce vs Steve | 31–12 | 72.09% |
| JustOnce vs Victor | 12–31 | 27.91% |
| JustOnce vs King | 10–32 | 23.81% |
| JustOnce vs Hwoarang | 15–23 | 39.47% |
| JustOnce vs Asuka | 18–20 | 47.37% |
| JustOnce vs Lidia | 20–18 | 52.63% |
| JustOnce vs Paul | 18–19 | 48.65% |
| JustOnce vs Eddy | 12–19 | 38.71% |
| JustOnce vs Jun | 11–18 | 37.93% |
| JustOnce vs Law | 14–14 | 50.00% |
| JustOnce vs Yoshimitsu | 5–23 | 17.86% |
| JustOnce vs Bryan | 8–20 | 28.57% |
| JustOnce vs Lee | 12–16 | 42.86% |
| JustOnce vs Azucena | 8–20 | 28.57% |
| JustOnce vs Devil Jin | 11–13 | 45.83% |
| JustOnce vs Alisa | 8–15 | 34.78% |
| JustOnce vs Lars | 8–13 | 38.10% |
| JustOnce vs Leo | 9–11 | 45.00% |
| JustOnce vs Leroy | 7–12 | 36.84% |
| JustOnce vs Nina | 9–9 | 50.00% |
| JustOnce vs Xiaoyu | 11–5 | 68.75% |
| JustOnce vs Feng | 8–8 | 50.00% |
| JustOnce vs Heihachi | 9–7 | 56.25% |
| JustOnce vs Claudio | 6–9 | 40.00% |
| JustOnce vs Shaheen | 8–6 | 57.14% |
| JustOnce vs Jack-8 | 7–3 | 70.00% |
| JustOnce vs Kuma | 3–5 | 37.50% |
| JustOnce vs Zafina | 4–2 | 66.67% |
| JustOnce vs Raven | 3–2 | 60.00% |
| JustOnce vs Panda | 2–2 | 50.00% |
| JustOnce vs Clive | 2–0 | 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.