| Jonny Martell vs Eddy | 34–42 | 44.74% |
| Jonny Martell vs Jin | 22–28 | 44.00% |
| Jonny Martell vs King | 18–23 | 43.90% |
| Jonny Martell vs Reina | 20–16–1 | 55.56% |
| Jonny Martell vs Kazuya | 18–18 | 50.00% |
| Jonny Martell vs Steve | 16–16 | 50.00% |
| Jonny Martell vs Hwoarang | 18–12 | 60.00% |
| Jonny Martell vs Bryan | 12–15 | 44.44% |
| Jonny Martell vs Paul | 10–14 | 41.67% |
| Jonny Martell vs Yoshimitsu | 9–14 | 39.13% |
| Jonny Martell vs Lee | 12–10 | 54.55% |
| Jonny Martell vs Dragunov | 8–13 | 38.10% |
| Jonny Martell vs Nina | 8–13 | 38.10% |
| Jonny Martell vs Azucena | 11–10 | 52.38% |
| Jonny Martell vs Asuka | 10–8 | 55.56% |
| Jonny Martell vs Feng | 4–14 | 22.22% |
| Jonny Martell vs Xiaoyu | 12–5 | 70.59% |
| Jonny Martell vs Victor | 10–6 | 62.50% |
| Jonny Martell vs Alisa | 8–7 | 53.33% |
| Jonny Martell vs Jun | 5–10 | 33.33% |
| Jonny Martell vs Jack-8 | 6–7 | 46.15% |
| Jonny Martell vs Leroy | 6–7 | 46.15% |
| Jonny Martell vs Raven | 5–8 | 38.46% |
| Jonny Martell vs Law | 4–8 | 33.33% |
| Jonny Martell vs Lili | 2–9 | 18.18% |
| Jonny Martell vs Lars | 5–5 | 50.00% |
| Jonny Martell vs Leo | 4–4 | 50.00% |
| Jonny Martell vs Zafina | 4–4 | 50.00% |
| Jonny Martell vs Devil Jin | 1–4 | 20.00% |
| Jonny Martell vs Claudio | 2–3 | 40.00% |
| Jonny Martell vs Kuma | 1–3 | 25.00% |
| Jonny Martell vs Shaheen | 1–1 | 50.00% |
| Jonny Martell vs Panda | 1–1 | 50.00% |
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.