| Ammy Eff vs King | 25–33 | 43.10% |
| Ammy Eff vs Armor King | 20–31 | 39.22% |
| Ammy Eff vs Kazuya | 29–19 | 60.42% |
| Ammy Eff vs Law | 24–19 | 55.81% |
| Ammy Eff vs Steve | 21–22 | 48.84% |
| Ammy Eff vs Reina | 21–18 | 53.85% |
| Ammy Eff vs Jin | 15–23 | 39.47% |
| Ammy Eff vs Lili | 19–18 | 51.35% |
| Ammy Eff vs Heihachi | 18–16 | 52.94% |
| Ammy Eff vs Miary Zo | 23–11 | 67.65% |
| Ammy Eff vs Eddy | 6–21 | 22.22% |
| Ammy Eff vs Bryan | 9–15 | 37.50% |
| Ammy Eff vs Asuka | 15–9 | 62.50% |
| Ammy Eff vs Fahkumram | 12–10 | 54.55% |
| Ammy Eff vs Dragunov | 12–9 | 57.14% |
| Ammy Eff vs Yoshimitsu | 12–8 | 60.00% |
| Ammy Eff vs Paul | 10–9 | 52.63% |
| Ammy Eff vs Devil Jin | 8–10 | 44.44% |
| Ammy Eff vs Lars | 5–12 | 29.41% |
| Ammy Eff vs Leo | 4–11 | 26.67% |
| Ammy Eff vs Xiaoyu | 8–6 | 57.14% |
| Ammy Eff vs Hwoarang | 5–8 | 38.46% |
| Ammy Eff vs Jack-8 | 3–8 | 27.27% |
| Ammy Eff vs Claudio | 7–4 | 63.64% |
| Ammy Eff vs Shaheen | 8–3 | 72.73% |
| Ammy Eff vs Azucena | 3–8 | 27.27% |
| Ammy Eff vs Feng | 6–4 | 60.00% |
| Ammy Eff vs Alisa | 4–6 | 40.00% |
| Ammy Eff vs Victor | 6–4 | 60.00% |
| Ammy Eff vs Anna | 4–6 | 40.00% |
| Ammy Eff vs Jun | 3–5 | 37.50% |
| Ammy Eff vs Nina | 3–4 | 42.86% |
| Ammy Eff vs Lee | 4–3 | 57.14% |
| Ammy Eff vs Panda | 2–4 | 33.33% |
| Ammy Eff vs Leroy | 4–2 | 66.67% |
| Ammy Eff vs Lidia | 5–1 | 83.33% |
| Ammy Eff vs Kuma | 3–2 | 60.00% |
| Ammy Eff vs Zafina | 2–3 | 40.00% |
| Ammy Eff vs Clive | 0–2 | 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.