| REX.21s vs Steve | 29–44 | 39.73% |
| REX.21s vs Jin | 11–34 | 24.44% |
| REX.21s vs King | 20–16 | 55.56% |
| REX.21s vs Kazuya | 9–26 | 25.71% |
| REX.21s vs Asuka | 6–28 | 17.65% |
| REX.21s vs Dragunov | 6–27 | 18.18% |
| REX.21s vs Armor King | 15–16 | 48.39% |
| REX.21s vs Bryan | 6–23 | 20.69% |
| REX.21s vs Reina | 10–18 | 35.71% |
| REX.21s vs Law | 9–17 | 34.62% |
| REX.21s vs Lili | 7–16 | 30.43% |
| REX.21s vs Miary Zo | 5–18 | 21.74% |
| REX.21s vs Paul | 5–17 | 22.73% |
| REX.21s vs Shaheen | 11–10 | 52.38% |
| REX.21s vs Victor | 5–16 | 23.81% |
| REX.21s vs Fahkumram | 9–12 | 42.86% |
| REX.21s vs Azucena | 12–7 | 63.16% |
| REX.21s vs Yoshimitsu | 11–5 | 68.75% |
| REX.21s vs Heihachi | 5–11 | 31.25% |
| REX.21s vs Hwoarang | 7–8 | 46.67% |
| REX.21s vs Lee | 7–8 | 46.67% |
| REX.21s vs Lidia | 7–8 | 46.67% |
| REX.21s vs Devil Jin | 7–5 | 58.33% |
| REX.21s vs Leroy | 7–5 | 58.33% |
| REX.21s vs Eddy | 1–11 | 8.33% |
| REX.21s vs Alisa | 3–7 | 30.00% |
| REX.21s vs Nina | 6–4 | 60.00% |
| REX.21s vs Leo | 2–6 | 25.00% |
| REX.21s vs Xiaoyu | 3–4 | 42.86% |
| REX.21s vs Lars | 0–6 | 0.00% |
| REX.21s vs Clive | 1–5 | 16.67% |
| REX.21s vs Anna | 1–4 | 20.00% |
| REX.21s vs Claudio | 4–0 | 100.00% |
| REX.21s vs Panda | 2–2 | 50.00% |
| REX.21s vs Jun | 0–4 | 0.00% |
| REX.21s vs Raven | 4–0 | 100.00% |
| REX.21s vs Jack-8 | 1–2 | 33.33% |
| REX.21s vs Zafina | 0–2 | 0.00% |
| REX.21s vs Feng | 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.