| Ironmask vs Reina | 16–6 | 72.73% |
| Ironmask vs Dragunov | 11–6 | 64.71% |
| Ironmask vs Paul | 15–1 | 93.75% |
| Ironmask vs Asuka | 10–6 | 62.50% |
| Ironmask vs Jin | 12–3 | 80.00% |
| Ironmask vs Bryan | 8–6 | 57.14% |
| Ironmask vs Kazuya | 10–4 | 71.43% |
| Ironmask vs Hwoarang | 9–4 | 69.23% |
| Ironmask vs King | 5–7 | 41.67% |
| Ironmask vs Yoshimitsu | 9–1 | 90.00% |
| Ironmask vs Xiaoyu | 5–2 | 71.43% |
| Ironmask vs Victor | 4–3 | 57.14% |
| Ironmask vs Jack-8 | 2–3 | 40.00% |
| Ironmask vs Nina | 5–0 | 100.00% |
| Ironmask vs Jun | 4–1 | 80.00% |
| Ironmask vs Steve | 3–1 | 75.00% |
| Ironmask vs Feng | 4–0 | 100.00% |
| Ironmask vs Lili | 3–1 | 75.00% |
| Ironmask vs Devil Jin | 2–1 | 66.67% |
| Ironmask vs Leroy | 2–1 | 66.67% |
| Ironmask vs Azucena | 1–2 | 33.33% |
| Ironmask vs Eddy | 2–1 | 66.67% |
| Ironmask vs Armor King | 2–1 | 66.67% |
| Ironmask vs Leo | 2–0 | 100.00% |
| Ironmask vs Shaheen | 0–2 | 0.00% |
| Ironmask vs Law | 1–0 | 100.00% |
| Ironmask vs Claudio | 1–0 | 100.00% |
| Ironmask vs Lee | 0–1 | 0.00% |
| Ironmask vs Zafina | 0–1 | 0.00% |
| Ironmask vs Lidia | 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.