| Alonso vs Jin | 5–5 | 50.00% |
| Alonso vs Victor | 6–4 | 60.00% |
| Alonso vs King | 6–3 | 66.67% |
| Alonso vs Yoshimitsu | 8–1 | 88.89% |
| Alonso vs Law | 4–4 | 50.00% |
| Alonso vs Lars | 8–0 | 100.00% |
| Alonso vs Lee | 3–4 | 42.86% |
| Alonso vs Bryan | 2–4 | 33.33% |
| Alonso vs Jun | 2–3 | 40.00% |
| Alonso vs Azucena | 2–3 | 40.00% |
| Alonso vs Asuka | 4–0 | 100.00% |
| Alonso vs Lili | 2–2 | 50.00% |
| Alonso vs Clive | 3–1 | 75.00% |
| Alonso vs Paul | 2–1 | 66.67% |
| Alonso vs Hwoarang | 1–2 | 33.33% |
| Alonso vs Kazuya | 2–1 | 66.67% |
| Alonso vs Devil Jin | 2–1 | 66.67% |
| Alonso vs Alisa | 1–2 | 33.33% |
| Alonso vs Reina | 3–0 | 100.00% |
| Alonso vs Heihachi | 1–2 | 33.33% |
| Alonso vs Xiaoyu | 2–0 | 100.00% |
| Alonso vs Steve | 1–1 | 50.00% |
| Alonso vs Jack-8 | 0–2 | 0.00% |
| Alonso vs Dragunov | 1–1 | 50.00% |
| Alonso vs Kuma | 1–1 | 50.00% |
| Alonso vs Eddy | 0–2 | 0.00% |
| Alonso vs Fahkumram | 0–2 | 0.00% |
| Alonso vs Armor King | 2–0 | 100.00% |
| Alonso vs Nina | 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.