| Kettei vs Steve | 34–55 | 38.20% |
| Kettei vs King | 27–56 | 32.53% |
| Kettei vs Jin | 15–52–1 | 22.39% |
| Kettei vs Armor King | 18–45 | 28.57% |
| Kettei vs Kazuya | 10–31 | 24.39% |
| Kettei vs Jun | 14–23 | 37.84% |
| Kettei vs Reina | 13–24 | 35.14% |
| Kettei vs Asuka | 12–22 | 35.29% |
| Kettei vs Eddy | 7–26 | 21.21% |
| Kettei vs Devil Jin | 7–23 | 23.33% |
| Kettei vs Bryan | 9–19 | 32.14% |
| Kettei vs Lili | 6–22 | 21.43% |
| Kettei vs Dragunov | 2–22 | 8.33% |
| Kettei vs Lee | 5–19 | 20.83% |
| Kettei vs Azucena | 4–17 | 19.05% |
| Kettei vs Law | 3–17 | 15.00% |
| Kettei vs Yoshimitsu | 7–12 | 36.84% |
| Kettei vs Claudio | 7–12 | 36.84% |
| Kettei vs Hwoarang | 4–14 | 22.22% |
| Kettei vs Fahkumram | 8–10 | 44.44% |
| Kettei vs Heihachi | 6–10 | 37.50% |
| Kettei vs Victor | 2–13 | 13.33% |
| Kettei vs Leo | 3–9 | 25.00% |
| Kettei vs Raven | 2–8 | 20.00% |
| Kettei vs Feng | 2–7 | 22.22% |
| Kettei vs Nina | 0–9 | 0.00% |
| Kettei vs Lidia | 1–8 | 11.11% |
| Kettei vs Xiaoyu | 4–4 | 50.00% |
| Kettei vs Jack-8 | 1–7 | 12.50% |
| Kettei vs Clive | 4–3 | 57.14% |
| Kettei vs Paul | 2–3 | 40.00% |
| Kettei vs Anna | 3–2 | 60.00% |
| Kettei vs Shaheen | 0–4 | 0.00% |
| Kettei vs Kuma | 0–4 | 0.00% |
| Kettei vs Panda | 1–2 | 33.33% |
| Kettei vs Alisa | 0–2 | 0.00% |
| Kettei vs Miary Zo | 0–2 | 0.00% |
| Kettei vs Lars | 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.