| Android 21 vs Clive | 23–95 | 19.49% |
| Android 21 vs King | 43–71 | 37.72% |
| Android 21 vs Reina | 45–69 | 39.47% |
| Android 21 vs Jin | 28–73 | 27.72% |
| Android 21 vs Steve | 33–58 | 36.26% |
| Android 21 vs Hwoarang | 31–59 | 34.44% |
| Android 21 vs Kazuya | 27–58 | 31.76% |
| Android 21 vs Eddy | 13–60 | 17.81% |
| Android 21 vs Bryan | 20–44 | 31.25% |
| Android 21 vs Law | 16–44 | 26.67% |
| Android 21 vs Asuka | 20–31 | 39.22% |
| Android 21 vs Lili | 16–35 | 31.37% |
| Android 21 vs Victor | 16–34 | 32.00% |
| Android 21 vs Dragunov | 11–38 | 22.45% |
| Android 21 vs Yoshimitsu | 8–33 | 19.51% |
| Android 21 vs Xiaoyu | 7–31 | 18.42% |
| Android 21 vs Leo | 11–27 | 28.95% |
| Android 21 vs Lee | 10–28 | 26.32% |
| Android 21 vs Lars | 7–30 | 18.92% |
| Android 21 vs Azucena | 14–23 | 37.84% |
| Android 21 vs Paul | 7–29 | 19.44% |
| Android 21 vs Jun | 8–28 | 22.22% |
| Android 21 vs Nina | 10–25 | 28.57% |
| Android 21 vs Jack-8 | 9–25 | 26.47% |
| Android 21 vs Heihachi | 10–17 | 37.04% |
| Android 21 vs Alisa | 4–21 | 16.00% |
| Android 21 vs Feng | 4–19 | 17.39% |
| Android 21 vs Devil Jin | 2–18 | 10.00% |
| Android 21 vs Leroy | 3–16 | 15.79% |
| Android 21 vs Raven | 6–12 | 33.33% |
| Android 21 vs Claudio | 6–11 | 35.29% |
| Android 21 vs Lidia | 6–11 | 35.29% |
| Android 21 vs Kuma | 4–11 | 26.67% |
| Android 21 vs Zafina | 6–1 | 85.71% |
| Android 21 vs Shaheen | 2–4 | 33.33% |
| Android 21 vs Panda | 1–3 | 25.00% |
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.