| João Castro vs Azucena | 11–5 | 68.75% |
| João Castro vs Reina | 6–6 | 50.00% |
| João Castro vs Yoshimitsu | 3–8 | 27.27% |
| João Castro vs Hwoarang | 3–7 | 30.00% |
| João Castro vs Jin | 3–6 | 33.33% |
| João Castro vs Devil Jin | 4–5 | 44.44% |
| João Castro vs Shaheen | 3–4 | 42.86% |
| João Castro vs Kazuya | 1–4 | 20.00% |
| João Castro vs Leo | 2–3 | 40.00% |
| João Castro vs Paul | 3–1 | 75.00% |
| João Castro vs King | 2–2 | 50.00% |
| João Castro vs Dragunov | 3–1 | 75.00% |
| João Castro vs Lars | 1–2 | 33.33% |
| João Castro vs Nina | 1–2 | 33.33% |
| João Castro vs Eddy | 0–3 | 0.00% |
| João Castro vs Law | 2–0 | 100.00% |
| João Castro vs Steve | 2–0 | 100.00% |
| João Castro vs Jack-8 | 0–2 | 0.00% |
| João Castro vs Lili | 0–2 | 0.00% |
| João Castro vs Lee | 0–2 | 0.00% |
| João Castro vs Panda | 0–2 | 0.00% |
| João Castro vs Victor | 1–1 | 50.00% |
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.