| Fireheart vs King | 17–16 | 51.52% |
| Fireheart vs Hwoarang | 14–15 | 48.28% |
| Fireheart vs Eddy | 10–18 | 35.71% |
| Fireheart vs Steve | 17–9 | 65.38% |
| Fireheart vs Jin | 6–18 | 25.00% |
| Fireheart vs Leroy | 8–12 | 40.00% |
| Fireheart vs Reina | 15–5 | 75.00% |
| Fireheart vs Bryan | 7–12 | 36.84% |
| Fireheart vs Dragunov | 10–9 | 52.63% |
| Fireheart vs Raven | 9–9 | 50.00% |
| Fireheart vs Nina | 9–8 | 52.94% |
| Fireheart vs Lee | 12–5 | 70.59% |
| Fireheart vs Law | 8–8 | 50.00% |
| Fireheart vs Kazuya | 9–6 | 60.00% |
| Fireheart vs Lili | 5–10 | 33.33% |
| Fireheart vs Asuka | 8–3 | 72.73% |
| Fireheart vs Kuma | 4–7 | 36.36% |
| Fireheart vs Paul | 4–5 | 44.44% |
| Fireheart vs Azucena | 6–3 | 66.67% |
| Fireheart vs Victor | 7–2 | 77.78% |
| Fireheart vs Lidia | 6–3 | 66.67% |
| Fireheart vs Yoshimitsu | 6–2 | 75.00% |
| Fireheart vs Xiaoyu | 3–5 | 37.50% |
| Fireheart vs Jun | 3–4 | 42.86% |
| Fireheart vs Feng | 4–2 | 66.67% |
| Fireheart vs Leo | 3–3 | 50.00% |
| Fireheart vs Alisa | 1–5 | 16.67% |
| Fireheart vs Lars | 3–2 | 60.00% |
| Fireheart vs Shaheen | 0–2 | 0.00% |
| Fireheart vs Zafina | 0–2 | 0.00% |
| Fireheart vs Heihachi | 0–2 | 0.00% |
| Fireheart vs Jack-8 | 1–0 | 100.00% |
| Fireheart vs Devil Jin | 1–0 | 100.00% |
| Fireheart vs Miary Zo | 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.