| Iosif vs Jin | 7–10 | 41.18% |
| Iosif vs Law | 6–10 | 37.50% |
| Iosif vs Nina | 6–8 | 42.86% |
| Iosif vs Hwoarang | 3–10 | 23.08% |
| Iosif vs Dragunov | 5–8 | 38.46% |
| Iosif vs Yoshimitsu | 1–10 | 9.09% |
| Iosif vs Jun | 5–5 | 50.00% |
| Iosif vs Reina | 7–3 | 70.00% |
| Iosif vs Paul | 2–7 | 22.22% |
| Iosif vs King | 3–6 | 33.33% |
| Iosif vs Bryan | 4–5 | 44.44% |
| Iosif vs Kazuya | 3–6 | 33.33% |
| Iosif vs Clive | 4–5 | 44.44% |
| Iosif vs Jack-8 | 5–3 | 62.50% |
| Iosif vs Lars | 4–4 | 50.00% |
| Iosif vs Lili | 5–2 | 71.43% |
| Iosif vs Raven | 3–3 | 50.00% |
| Iosif vs Eddy | 3–3 | 50.00% |
| Iosif vs Heihachi | 2–4 | 33.33% |
| Iosif vs Alisa | 4–1 | 80.00% |
| Iosif vs Anna | 3–2 | 60.00% |
| Iosif vs Steve | 2–2 | 50.00% |
| Iosif vs Devil Jin | 2–2 | 50.00% |
| Iosif vs Leo | 2–0 | 100.00% |
| Iosif vs Claudio | 2–0 | 100.00% |
| Iosif vs Azucena | 2–0 | 100.00% |
| Iosif vs Armor King | 0–2 | 0.00% |
| Iosif vs Asuka | 1–0 | 100.00% |
| Iosif vs Shaheen | 0–1 | 0.00% |
| Iosif vs Lidia | 0–1 | 0.00% |
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.