| Jecka vs Jin | 57–49 | 53.77% |
| Jecka vs King | 44–46 | 48.89% |
| Jecka vs Lee | 42–37 | 53.16% |
| Jecka vs Devil Jin | 44–34 | 56.41% |
| Jecka vs Hwoarang | 36–38 | 48.65% |
| Jecka vs Bryan | 35–39 | 47.30% |
| Jecka vs Lili | 38–24–1 | 61.29% |
| Jecka vs Kazuya | 29–28 | 50.88% |
| Jecka vs Steve | 31–22 | 58.49% |
| Jecka vs Dragunov | 23–28 | 45.10% |
| Jecka vs Feng | 19–26 | 42.22% |
| Jecka vs Azucena | 28–13 | 68.29% |
| Jecka vs Reina | 24–16 | 60.00% |
| Jecka vs Lars | 17–22 | 43.59% |
| Jecka vs Yoshimitsu | 19–19 | 50.00% |
| Jecka vs Jun | 22–15 | 59.46% |
| Jecka vs Zafina | 10–26 | 27.78% |
| Jecka vs Law | 12–20 | 37.50% |
| Jecka vs Victor | 16–16 | 50.00% |
| Jecka vs Xiaoyu | 17–14 | 54.84% |
| Jecka vs Paul | 13–16 | 44.83% |
| Jecka vs Nina | 6–19 | 24.00% |
| Jecka vs Claudio | 6–18 | 25.00% |
| Jecka vs Alisa | 12–11 | 52.17% |
| Jecka vs Jack-8 | 9–9 | 50.00% |
| Jecka vs Raven | 9–7 | 56.25% |
| Jecka vs Leroy | 4–9 | 30.77% |
| Jecka vs Shaheen | 7–5 | 58.33% |
| Jecka vs Kuma | 6–6 | 50.00% |
| Jecka vs Asuka | 7–4 | 63.64% |
| Jecka vs Eddy | 5–6 | 45.45% |
| Jecka vs Leo | 6–4 | 60.00% |
| Jecka vs Panda | 3–2 | 60.00% |
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.