| Iohan vs Reina | 18–4 | 81.82% |
| Iohan vs Steve | 13–7 | 65.00% |
| Iohan vs Heihachi | 10–10 | 50.00% |
| Iohan vs Kazuya | 12–4 | 75.00% |
| Iohan vs Bryan | 12–3 | 80.00% |
| Iohan vs Lili | 11–4 | 73.33% |
| Iohan vs King | 6–8 | 42.86% |
| Iohan vs Leroy | 8–3 | 72.73% |
| Iohan vs Azucena | 11–0 | 100.00% |
| Iohan vs Clive | 7–4 | 63.64% |
| Iohan vs Paul | 9–1 | 90.00% |
| Iohan vs Hwoarang | 7–3 | 70.00% |
| Iohan vs Leo | 5–4 | 55.56% |
| Iohan vs Jun | 6–3 | 66.67% |
| Iohan vs Devil Jin | 5–3 | 62.50% |
| Iohan vs Fahkumram | 5–3 | 62.50% |
| Iohan vs Alisa | 5–2 | 71.43% |
| Iohan vs Lee | 4–3 | 57.14% |
| Iohan vs Law | 2–4 | 33.33% |
| Iohan vs Jin | 6–0 | 100.00% |
| Iohan vs Zafina | 3–2 | 60.00% |
| Iohan vs Xiaoyu | 4–0 | 100.00% |
| Iohan vs Claudio | 2–2 | 50.00% |
| Iohan vs Yoshimitsu | 1–2 | 33.33% |
| Iohan vs Jack-8 | 1–2 | 33.33% |
| Iohan vs Eddy | 1–2 | 33.33% |
| Iohan vs Asuka | 0–2 | 0.00% |
| Iohan vs Feng | 2–0 | 100.00% |
| Iohan vs Lars | 2–0 | 100.00% |
| Iohan vs Victor | 2–0 | 100.00% |
| Iohan vs Lidia | 0–2 | 0.00% |
| Iohan vs Anna | 1–1 | 50.00% |
| Iohan vs Dragunov | 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.