| Firro vs Jin | 100–98 | 50.51% |
| Firro vs Kazuya | 104–81 | 56.22% |
| Firro vs King | 93–72 | 56.36% |
| Firro vs Bryan | 59–95 | 38.31% |
| Firro vs Heihachi | 68–57 | 54.40% |
| Firro vs Reina | 68–53 | 56.20% |
| Firro vs Steve | 61–50 | 54.95% |
| Firro vs Fahkumram | 58–52 | 52.73% |
| Firro vs Hwoarang | 44–50 | 46.81% |
| Firro vs Law | 56–31 | 64.37% |
| Firro vs Dragunov | 41–46 | 47.13% |
| Firro vs Clive | 43–37 | 53.75% |
| Firro vs Devil Jin | 29–41 | 41.43% |
| Firro vs Lili | 40–28 | 58.82% |
| Firro vs Asuka | 36–31 | 53.73% |
| Firro vs Paul | 32–34 | 48.48% |
| Firro vs Lee | 26–33 | 44.07% |
| Firro vs Jun | 28–30 | 48.28% |
| Firro vs Yoshimitsu | 26–27 | 49.06% |
| Firro vs Nina | 22–31 | 41.51% |
| Firro vs Feng | 23–27 | 46.00% |
| Firro vs Alisa | 17–24 | 41.46% |
| Firro vs Azucena | 20–21 | 48.78% |
| Firro vs Claudio | 24–12 | 66.67% |
| Firro vs Lidia | 16–20 | 44.44% |
| Firro vs Leo | 18–14 | 56.25% |
| Firro vs Xiaoyu | 16–12 | 57.14% |
| Firro vs Victor | 18–9 | 66.67% |
| Firro vs Eddy | 10–17 | 37.04% |
| Firro vs Anna | 12–15 | 44.44% |
| Firro vs Leroy | 9–16 | 36.00% |
| Firro vs Jack-8 | 9–15 | 37.50% |
| Firro vs Armor King | 9–13 | 40.91% |
| Firro vs Lars | 9–11 | 45.00% |
| Firro vs Kuma | 7–11 | 38.89% |
| Firro vs Shaheen | 9–5 | 64.29% |
| Firro vs Raven | 9–5 | 64.29% |
| Firro vs Zafina | 2–4 | 33.33% |
| Firro vs Panda | 1–3 | 25.00% |
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.