| Iosa vs Jin | 52–61 | 46.02% |
| Iosa vs Kazuya | 51–61 | 45.54% |
| Iosa vs King | 47–34 | 58.02% |
| Iosa vs Bryan | 27–49 | 35.53% |
| Iosa vs Reina | 35–41 | 46.05% |
| Iosa vs Dragunov | 26–42 | 38.24% |
| Iosa vs Heihachi | 22–45 | 32.84% |
| Iosa vs Hwoarang | 37–29 | 56.06% |
| Iosa vs Steve | 35–29 | 54.69% |
| Iosa vs Law | 27–31 | 46.55% |
| Iosa vs Feng | 34–20 | 62.96% |
| Iosa vs Lili | 34–17–1 | 66.67% |
| Iosa vs Paul | 26–20 | 56.52% |
| Iosa vs Yoshimitsu | 20–25 | 44.44% |
| Iosa vs Alisa | 18–22 | 45.00% |
| Iosa vs Devil Jin | 19–18 | 51.35% |
| Iosa vs Asuka | 23–13 | 63.89% |
| Iosa vs Lars | 18–18 | 50.00% |
| Iosa vs Nina | 17–17 | 50.00% |
| Iosa vs Jun | 14–15 | 48.28% |
| Iosa vs Raven | 16–13 | 55.17% |
| Iosa vs Victor | 17–11 | 60.71% |
| Iosa vs Lee | 14–13 | 51.85% |
| Iosa vs Azucena | 13–14 | 48.15% |
| Iosa vs Xiaoyu | 9–17 | 34.62% |
| Iosa vs Leo | 14–9 | 60.87% |
| Iosa vs Lidia | 8–14 | 36.36% |
| Iosa vs Claudio | 14–7 | 66.67% |
| Iosa vs Jack-8 | 8–12 | 40.00% |
| Iosa vs Kuma | 9–9 | 50.00% |
| Iosa vs Eddy | 11–7 | 61.11% |
| Iosa vs Shaheen | 9–4 | 69.23% |
| Iosa vs Leroy | 6–4 | 60.00% |
| Iosa vs Panda | 5–4 | 55.56% |
| Iosa vs Clive | 6–3 | 66.67% |
| Iosa vs Zafina | 2–3 | 40.00% |
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.