| RC21 vs King | 10–6 | 62.50% |
| RC21 vs Zafina | 2–2 | 50.00% |
| RC21 vs Bryan | 1–2 | 33.33% |
| RC21 vs Lars | 0–3 | 0.00% |
| RC21 vs Kuma | 1–2 | 33.33% |
| RC21 vs Eddy | 3–0 | 100.00% |
| RC21 vs Kazuya | 2–0 | 100.00% |
| RC21 vs Steve | 2–0 | 100.00% |
| RC21 vs Jack-8 | 2–0 | 100.00% |
| RC21 vs Lili | 0–2 | 0.00% |
| RC21 vs Leroy | 2–0 | 100.00% |
| RC21 vs Reina | 1–1 | 50.00% |
| RC21 vs Victor | 1–1 | 50.00% |
| RC21 vs Dragunov | 1–0 | 100.00% |
| RC21 vs Azucena | 1–0 | 100.00% |
| RC21 vs Armor King | 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.