| King-Amumu vs King | 10–5 | 66.67% |
| King-Amumu vs Reina | 5–5 | 50.00% |
| King-Amumu vs Law | 2–7 | 22.22% |
| King-Amumu vs Nina | 4–4 | 50.00% |
| King-Amumu vs Paul | 4–3 | 57.14% |
| King-Amumu vs Bryan | 6–1 | 85.71% |
| King-Amumu vs Anna | 3–3 | 50.00% |
| King-Amumu vs Steve | 4–1 | 80.00% |
| King-Amumu vs Asuka | 3–2 | 60.00% |
| King-Amumu vs Feng | 2–3 | 40.00% |
| King-Amumu vs Lili | 2–3 | 40.00% |
| King-Amumu vs Dragunov | 2–3 | 40.00% |
| King-Amumu vs Yoshimitsu | 2–2 | 50.00% |
| King-Amumu vs Jin | 1–3 | 25.00% |
| King-Amumu vs Clive | 3–1 | 75.00% |
| King-Amumu vs Hwoarang | 2–1 | 66.67% |
| King-Amumu vs Xiaoyu | 3–0 | 100.00% |
| King-Amumu vs Jun | 0–3 | 0.00% |
| King-Amumu vs Raven | 1–2 | 33.33% |
| King-Amumu vs Leo | 2–0 | 100.00% |
| King-Amumu vs Alisa | 0–2 | 0.00% |
| King-Amumu vs Heihachi | 2–0 | 100.00% |
| King-Amumu vs Kazuya | 0–1 | 0.00% |
| King-Amumu vs Zafina | 1–0 | 100.00% |
| King-Amumu vs Victor | 0–1 | 0.00% |
| King-Amumu vs Eddy | 0–1 | 0.00% |
| King-Amumu vs Lidia | 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.