| Ironmask vs Bryan | 20–5 | 80.00% |
| Ironmask vs Steve | 11–5 | 68.75% |
| Ironmask vs Law | 8–2 | 80.00% |
| Ironmask vs King | 5–5 | 50.00% |
| Ironmask vs Lili | 5–5 | 50.00% |
| Ironmask vs Nina | 7–3 | 70.00% |
| Ironmask vs Jin | 5–4 | 55.56% |
| Ironmask vs Reina | 4–5 | 44.44% |
| Ironmask vs Hwoarang | 5–3 | 62.50% |
| Ironmask vs Eddy | 5–3 | 62.50% |
| Ironmask vs Yoshimitsu | 6–1 | 85.71% |
| Ironmask vs Kazuya | 5–2 | 71.43% |
| Ironmask vs Clive | 7–0 | 100.00% |
| Ironmask vs Asuka | 2–3 | 40.00% |
| Ironmask vs Dragunov | 5–0 | 100.00% |
| Ironmask vs Lars | 3–2 | 60.00% |
| Ironmask vs Lidia | 3–2 | 60.00% |
| Ironmask vs Alisa | 3–1 | 75.00% |
| Ironmask vs Heihachi | 4–0 | 100.00% |
| Ironmask vs Anna | 4–0 | 100.00% |
| Ironmask vs Jack-8 | 3–0 | 100.00% |
| Ironmask vs Kuma | 3–0 | 100.00% |
| Ironmask vs Azucena | 1–2 | 33.33% |
| Ironmask vs Raven | 1–2 | 33.33% |
| Ironmask vs Feng | 0–2 | 0.00% |
| Ironmask vs Lee | 0–2 | 0.00% |
| Ironmask vs Zafina | 2–0 | 100.00% |
| Ironmask vs Jun | 2–0 | 100.00% |
| Ironmask vs Victor | 2–0 | 100.00% |
| Ironmask vs Claudio | 0–1 | 0.00% |
| Ironmask vs Shaheen | 1–0 | 100.00% |
| Ironmask vs Fahkumram | 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.