| Alastor vs Eddy | 13–25 | 34.21% |
| Alastor vs King | 14–14 | 50.00% |
| Alastor vs Reina | 14–8 | 63.64% |
| Alastor vs Jin | 11–9 | 55.00% |
| Alastor vs Steve | 14–5 | 73.68% |
| Alastor vs Hwoarang | 7–11 | 38.89% |
| Alastor vs Bryan | 8–7 | 53.33% |
| Alastor vs Armor King | 5–9 | 35.71% |
| Alastor vs Azucena | 8–3 | 72.73% |
| Alastor vs Jun | 4–6 | 40.00% |
| Alastor vs Law | 4–5 | 44.44% |
| Alastor vs Raven | 7–2 | 77.78% |
| Alastor vs Paul | 2–6 | 25.00% |
| Alastor vs Yoshimitsu | 4–4 | 50.00% |
| Alastor vs Kazuya | 4–4 | 50.00% |
| Alastor vs Jack-8 | 2–6 | 25.00% |
| Alastor vs Lee | 6–2 | 75.00% |
| Alastor vs Victor | 4–4 | 50.00% |
| Alastor vs Xiaoyu | 3–4 | 42.86% |
| Alastor vs Devil Jin | 3–4 | 42.86% |
| Alastor vs Feng | 2–5 | 28.57% |
| Alastor vs Leroy | 5–2 | 71.43% |
| Alastor vs Leo | 6–0 | 100.00% |
| Alastor vs Shaheen | 2–4 | 33.33% |
| Alastor vs Asuka | 3–2 | 60.00% |
| Alastor vs Dragunov | 1–4 | 20.00% |
| Alastor vs Alisa | 4–1 | 80.00% |
| Alastor vs Heihachi | 2–2 | 50.00% |
| Alastor vs Miary Zo | 0–4 | 0.00% |
| Alastor vs Lars | 2–1 | 66.67% |
| Alastor vs Kuma | 2–1 | 66.67% |
| Alastor vs Anna | 3–0 | 100.00% |
| Alastor vs Lili | 1–1 | 50.00% |
| Alastor vs Lidia | 2–0 | 100.00% |
| Alastor vs Clive | 0–2 | 0.00% |
| Alastor vs Claudio | 0–1 | 0.00% |
| Alastor vs Nina | 0–1 | 0.00% |
| Alastor vs Panda | 0–1 | 0.00% |
| Alastor vs Fahkumram | 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.