| ionstrom vs Reina | 18–5 | 78.26% |
| ionstrom vs Jin | 6–8 | 42.86% |
| ionstrom vs Heihachi | 12–2 | 85.71% |
| ionstrom vs Steve | 12–0 | 100.00% |
| ionstrom vs Dragunov | 10–1 | 90.91% |
| ionstrom vs King | 7–3 | 70.00% |
| ionstrom vs Claudio | 8–1 | 88.89% |
| ionstrom vs Kazuya | 8–0 | 100.00% |
| ionstrom vs Devil Jin | 8–0 | 100.00% |
| ionstrom vs Leroy | 8–0 | 100.00% |
| ionstrom vs Victor | 5–2 | 71.43% |
| ionstrom vs Lidia | 7–0 | 100.00% |
| ionstrom vs Xiaoyu | 4–2 | 66.67% |
| ionstrom vs Nina | 5–1 | 83.33% |
| ionstrom vs Hwoarang | 4–1 | 80.00% |
| ionstrom vs Lee | 4–1 | 80.00% |
| ionstrom vs Jun | 5–0 | 100.00% |
| ionstrom vs Eddy | 3–2 | 60.00% |
| ionstrom vs Paul | 4–0 | 100.00% |
| ionstrom vs Clive | 4–0 | 100.00% |
| ionstrom vs Bryan | 2–1 | 66.67% |
| ionstrom vs Lili | 3–0 | 100.00% |
| ionstrom vs Lars | 3–0 | 100.00% |
| ionstrom vs Jack-8 | 0–2 | 0.00% |
| ionstrom vs Asuka | 0–2 | 0.00% |
| ionstrom vs Alisa | 2–0 | 100.00% |
| ionstrom vs Kuma | 2–0 | 100.00% |
| ionstrom vs Azucena | 2–0 | 100.00% |
| ionstrom vs Leo | 0–1 | 0.00% |
| ionstrom vs Shaheen | 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.