| Iolo vs Reina | 7–7 | 50.00% |
| Iolo vs King | 2–9 | 18.18% |
| Iolo vs Kazuya | 5–5 | 50.00% |
| Iolo vs Eddy | 1–8 | 11.11% |
| Iolo vs Jin | 3–4 | 42.86% |
| Iolo vs Feng | 4–3 | 57.14% |
| Iolo vs Jun | 4–3 | 57.14% |
| Iolo vs Steve | 4–2 | 66.67% |
| Iolo vs Lili | 3–2 | 60.00% |
| Iolo vs Dragunov | 1–4 | 20.00% |
| Iolo vs Asuka | 0–4 | 0.00% |
| Iolo vs Yoshimitsu | 1–2 | 33.33% |
| Iolo vs Hwoarang | 3–0 | 100.00% |
| Iolo vs Xiaoyu | 1–2 | 33.33% |
| Iolo vs Leo | 1–2 | 33.33% |
| Iolo vs Claudio | 1–2 | 33.33% |
| Iolo vs Panda | 1–2 | 33.33% |
| Iolo vs Azucena | 1–2 | 33.33% |
| Iolo vs Victor | 2–1 | 66.67% |
| Iolo vs Paul | 2–0 | 100.00% |
| Iolo vs Bryan | 0–2 | 0.00% |
| Iolo vs Lars | 1–1 | 50.00% |
| Iolo vs Kuma | 0–2 | 0.00% |
| Iolo vs Law | 1–0 | 100.00% |
| Iolo vs Devil Jin | 1–0 | 100.00% |
| Iolo vs Nina | 1–0 | 100.00% |
| Iolo vs Leroy | 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.