| K4N9 vs King | 18–10 | 64.29% |
| K4N9 vs Bryan | 8–10 | 44.44% |
| K4N9 vs Reina | 8–7 | 53.33% |
| K4N9 vs Law | 6–8 | 42.86% |
| K4N9 vs Steve | 8–4 | 66.67% |
| K4N9 vs Jin | 4–6 | 40.00% |
| K4N9 vs Asuka | 4–5 | 44.44% |
| K4N9 vs Lili | 5–4 | 55.56% |
| K4N9 vs Victor | 7–2 | 77.78% |
| K4N9 vs Kazuya | 5–2 | 71.43% |
| K4N9 vs Leo | 4–3 | 57.14% |
| K4N9 vs Nina | 4–2 | 66.67% |
| K4N9 vs Jun | 3–3 | 50.00% |
| K4N9 vs Anna | 3–3 | 50.00% |
| K4N9 vs Yoshimitsu | 4–1 | 80.00% |
| K4N9 vs Dragunov | 4–1 | 80.00% |
| K4N9 vs Lars | 2–3 | 40.00% |
| K4N9 vs Paul | 3–1 | 75.00% |
| K4N9 vs Hwoarang | 0–4 | 0.00% |
| K4N9 vs Lee | 2–2 | 50.00% |
| K4N9 vs Zafina | 2–2 | 50.00% |
| K4N9 vs Lidia | 0–4 | 0.00% |
| K4N9 vs Heihachi | 1–3 | 25.00% |
| K4N9 vs Alisa | 2–1 | 66.67% |
| K4N9 vs Leroy | 1–2 | 33.33% |
| K4N9 vs Azucena | 2–1 | 66.67% |
| K4N9 vs Clive | 1–2 | 33.33% |
| K4N9 vs Xiaoyu | 0–2 | 0.00% |
| K4N9 vs Jack-8 | 2–0 | 100.00% |
| K4N9 vs Devil Jin | 2–0 | 100.00% |
| K4N9 vs Feng | 0–2 | 0.00% |
| K4N9 vs Claudio | 0–2 | 0.00% |
| K4N9 vs Shaheen | 2–0 | 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.