| Heartsteel vs King | 12–3 | 80.00% |
| Heartsteel vs Bryan | 8–7 | 53.33% |
| Heartsteel vs Jin | 9–3 | 75.00% |
| Heartsteel vs Kazuya | 6–6 | 50.00% |
| Heartsteel vs Devil Jin | 5–6 | 45.45% |
| Heartsteel vs Jun | 7–2 | 77.78% |
| Heartsteel vs Asuka | 5–3 | 62.50% |
| Heartsteel vs Leo | 5–3 | 62.50% |
| Heartsteel vs Lee | 3–5 | 37.50% |
| Heartsteel vs Heihachi | 6–1 | 85.71% |
| Heartsteel vs Clive | 5–2 | 71.43% |
| Heartsteel vs Yoshimitsu | 4–2 | 66.67% |
| Heartsteel vs Dragunov | 4–2 | 66.67% |
| Heartsteel vs Reina | 6–0 | 100.00% |
| Heartsteel vs Paul | 2–3 | 40.00% |
| Heartsteel vs Steve | 4–1 | 80.00% |
| Heartsteel vs Lili | 2–3 | 40.00% |
| Heartsteel vs Lars | 4–1 | 80.00% |
| Heartsteel vs Victor | 5–0 | 100.00% |
| Heartsteel vs Feng | 4–0 | 100.00% |
| Heartsteel vs Alisa | 3–1 | 75.00% |
| Heartsteel vs Eddy | 1–3 | 25.00% |
| Heartsteel vs Hwoarang | 1–2 | 33.33% |
| Heartsteel vs Claudio | 1–2 | 33.33% |
| Heartsteel vs Leroy | 2–1 | 66.67% |
| Heartsteel vs Azucena | 2–1 | 66.67% |
| Heartsteel vs Lidia | 2–1 | 66.67% |
| Heartsteel vs Law | 2–0 | 100.00% |
| Heartsteel vs Shaheen | 0–2 | 0.00% |
| Heartsteel vs Nina | 2–0 | 100.00% |
| Heartsteel vs Xiaoyu | 1–0 | 100.00% |
| Heartsteel vs Anna | 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.