| Hierro vs Hwoarang | 9–5 | 64.29% |
| Hierro vs Bryan | 11–3 | 78.57% |
| Hierro vs Miary Zo | 10–1 | 90.91% |
| Hierro vs Kazuya | 3–5 | 37.50% |
| Hierro vs Azucena | 5–3 | 62.50% |
| Hierro vs Armor King | 5–3 | 62.50% |
| Hierro vs Law | 4–3 | 57.14% |
| Hierro vs King | 5–2 | 71.43% |
| Hierro vs Jin | 3–3 | 50.00% |
| Hierro vs Steve | 2–3 | 40.00% |
| Hierro vs Asuka | 2–3 | 40.00% |
| Hierro vs Dragunov | 2–3 | 40.00% |
| Hierro vs Lars | 4–1 | 80.00% |
| Hierro vs Eddy | 2–3 | 40.00% |
| Hierro vs Devil Jin | 3–1 | 75.00% |
| Hierro vs Kuma | 2–2 | 50.00% |
| Hierro vs Zafina | 4–0 | 100.00% |
| Hierro vs Jun | 4–0 | 100.00% |
| Hierro vs Victor | 4–0 | 100.00% |
| Hierro vs Lidia | 4–0 | 100.00% |
| Hierro vs Lili | 3–0 | 100.00% |
| Hierro vs Shaheen | 2–1 | 66.67% |
| Hierro vs Nina | 1–2 | 33.33% |
| Hierro vs Heihachi | 2–1 | 66.67% |
| Hierro vs Anna | 1–2 | 33.33% |
| Hierro vs Yoshimitsu | 0–2 | 0.00% |
| Hierro vs Feng | 0–2 | 0.00% |
| Hierro vs Alisa | 0–2 | 0.00% |
| Hierro vs Leroy | 0–2 | 0.00% |
| Hierro vs Clive | 0–2 | 0.00% |
| Hierro vs Fahkumram | 1–1 | 50.00% |
| Hierro vs Jack-8 | 0–1 | 0.00% |
| Hierro vs Leo | 0–1 | 0.00% |
| Hierro vs Lee | 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.