| Iosa vs Jin | 16–16 | 50.00% |
| Iosa vs Bryan | 8–11 | 42.11% |
| Iosa vs Yoshimitsu | 8–8 | 50.00% |
| Iosa vs Lili | 6–10 | 37.50% |
| Iosa vs Kazuya | 8–6 | 57.14% |
| Iosa vs Steve | 10–4 | 71.43% |
| Iosa vs Paul | 6–5 | 54.55% |
| Iosa vs Dragunov | 4–6 | 40.00% |
| Iosa vs Lee | 7–3 | 70.00% |
| Iosa vs Hwoarang | 7–2 | 77.78% |
| Iosa vs Jun | 3–6 | 33.33% |
| Iosa vs King | 4–4 | 50.00% |
| Iosa vs Nina | 3–4 | 42.86% |
| Iosa vs Devil Jin | 4–2 | 66.67% |
| Iosa vs Lars | 4–2 | 66.67% |
| Iosa vs Azucena | 4–2 | 66.67% |
| Iosa vs Victor | 2–4 | 33.33% |
| Iosa vs Law | 2–3 | 40.00% |
| Iosa vs Xiaoyu | 4–1 | 80.00% |
| Iosa vs Asuka | 1–4 | 20.00% |
| Iosa vs Feng | 4–1 | 80.00% |
| Iosa vs Alisa | 2–3 | 40.00% |
| Iosa vs Reina | 4–1 | 80.00% |
| Iosa vs Claudio | 3–1 | 75.00% |
| Iosa vs Lidia | 2–2 | 50.00% |
| Iosa vs Eddy | 1–2 | 33.33% |
| Iosa vs Fahkumram | 2–1 | 66.67% |
| Iosa vs Jack-8 | 0–2 | 0.00% |
| Iosa vs Leo | 0–1 | 0.00% |
| Iosa vs Kuma | 1–0 | 100.00% |
| Iosa vs Panda | 0–1 | 0.00% |
| Iosa vs Heihachi | 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.