| Jontka vs Reina | 15–9 | 62.50% |
| Jontka vs Kazuya | 14–5 | 73.68% |
| Jontka vs Yoshimitsu | 13–5 | 72.22% |
| Jontka vs Paul | 10–3 | 76.92% |
| Jontka vs King | 10–3 | 76.92% |
| Jontka vs Heihachi | 10–3 | 76.92% |
| Jontka vs Asuka | 9–3 | 75.00% |
| Jontka vs Bryan | 9–2 | 81.82% |
| Jontka vs Lili | 6–5 | 54.55% |
| Jontka vs Jun | 8–3 | 72.73% |
| Jontka vs Hwoarang | 5–5 | 50.00% |
| Jontka vs Law | 8–1 | 88.89% |
| Jontka vs Steve | 6–2 | 75.00% |
| Jontka vs Feng | 4–3 | 57.14% |
| Jontka vs Azucena | 1–6 | 14.29% |
| Jontka vs Jin | 6–0 | 100.00% |
| Jontka vs Jack-8 | 3–3 | 50.00% |
| Jontka vs Devil Jin | 5–1 | 83.33% |
| Jontka vs Raven | 1–4 | 20.00% |
| Jontka vs Clive | 2–3 | 40.00% |
| Jontka vs Xiaoyu | 4–0 | 100.00% |
| Jontka vs Dragunov | 2–2 | 50.00% |
| Jontka vs Lars | 3–0 | 100.00% |
| Jontka vs Alisa | 1–2 | 33.33% |
| Jontka vs Claudio | 2–1 | 66.67% |
| Jontka vs Lee | 2–1 | 66.67% |
| Jontka vs Victor | 1–2 | 33.33% |
| Jontka vs Eddy | 0–3 | 0.00% |
| Jontka vs Nina | 2–0 | 100.00% |
| Jontka vs Leroy | 2–0 | 100.00% |
| Jontka vs Leo | 1–0 | 100.00% |
| Jontka vs Anna | 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.