| IOON vs Kazuya | 49–35 | 58.33% |
| IOON vs King | 31–48 | 39.24% |
| IOON vs Jin | 43–17 | 71.67% |
| IOON vs Bryan | 36–17 | 67.92% |
| IOON vs Reina | 17–33 | 34.00% |
| IOON vs Steve | 30–18 | 62.50% |
| IOON vs Yoshimitsu | 26–16 | 61.90% |
| IOON vs Hwoarang | 29–13 | 69.05% |
| IOON vs Lili | 19–21 | 47.50% |
| IOON vs Dragunov | 17–23 | 42.50% |
| IOON vs Jun | 20–17 | 54.05% |
| IOON vs Azucena | 18–17 | 51.43% |
| IOON vs Fahkumram | 15–17 | 46.88% |
| IOON vs Law | 8–23 | 25.81% |
| IOON vs Xiaoyu | 9–21 | 30.00% |
| IOON vs Lee | 13–17 | 43.33% |
| IOON vs Paul | 23–5 | 82.14% |
| IOON vs Eddy | 8–19 | 29.63% |
| IOON vs Lars | 12–14 | 46.15% |
| IOON vs Feng | 14–7 | 66.67% |
| IOON vs Asuka | 7–13 | 35.00% |
| IOON vs Leroy | 9–10 | 47.37% |
| IOON vs Victor | 6–13 | 31.58% |
| IOON vs Heihachi | 11–8 | 57.89% |
| IOON vs Jack-8 | 7–10 | 41.18% |
| IOON vs Leo | 11–6 | 64.71% |
| IOON vs Kuma | 4–13 | 23.53% |
| IOON vs Shaheen | 9–6 | 60.00% |
| IOON vs Nina | 4–11 | 26.67% |
| IOON vs Armor King | 6–9 | 40.00% |
| IOON vs Alisa | 5–6 | 45.45% |
| IOON vs Devil Jin | 4–6 | 40.00% |
| IOON vs Raven | 5–5 | 50.00% |
| IOON vs Zafina | 5–4 | 55.56% |
| IOON vs Claudio | 4–4 | 50.00% |
| IOON vs Lidia | 4–3 | 57.14% |
| IOON vs Panda | 2–1 | 66.67% |
| IOON vs Clive | 0–2 | 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.