| Alastor vs King | 12–14 | 46.15% |
| Alastor vs Jin | 6–12 | 33.33% |
| Alastor vs Reina | 6–5 | 54.55% |
| Alastor vs Law | 7–3 | 70.00% |
| Alastor vs Victor | 9–1 | 90.00% |
| Alastor vs Clive | 7–3 | 70.00% |
| Alastor vs Dragunov | 7–2 | 77.78% |
| Alastor vs Bryan | 5–2 | 71.43% |
| Alastor vs Lars | 2–5 | 28.57% |
| Alastor vs Hwoarang | 4–2 | 66.67% |
| Alastor vs Nina | 1–5 | 16.67% |
| Alastor vs Kazuya | 1–4 | 20.00% |
| Alastor vs Lili | 2–3 | 40.00% |
| Alastor vs Yoshimitsu | 3–1 | 75.00% |
| Alastor vs Claudio | 2–2 | 50.00% |
| Alastor vs Shaheen | 2–2 | 50.00% |
| Alastor vs Lee | 2–2 | 50.00% |
| Alastor vs Lidia | 0–4 | 0.00% |
| Alastor vs Armor King | 0–4 | 0.00% |
| Alastor vs Steve | 2–1 | 66.67% |
| Alastor vs Devil Jin | 2–1 | 66.67% |
| Alastor vs Feng | 1–2 | 33.33% |
| Alastor vs Jun | 2–1 | 66.67% |
| Alastor vs Raven | 2–1 | 66.67% |
| Alastor vs Zafina | 2–0 | 100.00% |
| Alastor vs Anna | 2–0 | 100.00% |
| Alastor vs Asuka | 0–1 | 0.00% |
| Alastor vs Alisa | 0–1 | 0.00% |
| Alastor vs Eddy | 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.