| Koss9i vs Jin | 8–4 | 66.67% |
| Koss9i vs Heihachi | 6–4 | 60.00% |
| Koss9i vs Law | 4–5 | 44.44% |
| Koss9i vs Fahkumram | 2–6 | 25.00% |
| Koss9i vs King | 3–3 | 50.00% |
| Koss9i vs Jun | 5–1 | 83.33% |
| Koss9i vs Eddy | 3–3 | 50.00% |
| Koss9i vs Hwoarang | 3–2 | 60.00% |
| Koss9i vs Steve | 4–1 | 80.00% |
| Koss9i vs Anna | 2–3 | 40.00% |
| Koss9i vs Alisa | 2–2 | 50.00% |
| Koss9i vs Nina | 1–3 | 25.00% |
| Koss9i vs Reina | 3–1 | 75.00% |
| Koss9i vs Victor | 3–1 | 75.00% |
| Koss9i vs Yoshimitsu | 1–2 | 33.33% |
| Koss9i vs Jack-8 | 1–2 | 33.33% |
| Koss9i vs Asuka | 1–2 | 33.33% |
| Koss9i vs Feng | 1–2 | 33.33% |
| Koss9i vs Dragunov | 2–1 | 66.67% |
| Koss9i vs Zafina | 2–1 | 66.67% |
| Koss9i vs Lili | 1–1 | 50.00% |
| Koss9i vs Lars | 0–2 | 0.00% |
| Koss9i vs Lee | 0–2 | 0.00% |
| Koss9i vs Kuma | 1–1 | 50.00% |
| Koss9i vs Leroy | 2–0 | 100.00% |
| Koss9i vs Azucena | 2–0 | 100.00% |
| Koss9i vs Devil Jin | 1–0 | 100.00% |
| Koss9i vs Claudio | 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.