| Cosmo vs Eddy | 12–20 | 37.50% |
| Cosmo vs Jin | 17–13 | 56.67% |
| Cosmo vs King | 10–4 | 71.43% |
| Cosmo vs Bryan | 5–4 | 55.56% |
| Cosmo vs Hwoarang | 5–3 | 62.50% |
| Cosmo vs Leo | 2–6 | 25.00% |
| Cosmo vs Lee | 3–5 | 37.50% |
| Cosmo vs Jun | 5–3 | 62.50% |
| Cosmo vs Kazuya | 4–3 | 57.14% |
| Cosmo vs Feng | 3–4 | 42.86% |
| Cosmo vs Alisa | 4–3 | 57.14% |
| Cosmo vs Steve | 5–0 | 100.00% |
| Cosmo vs Jack-8 | 2–3 | 40.00% |
| Cosmo vs Dragunov | 2–3 | 40.00% |
| Cosmo vs Lars | 1–4 | 20.00% |
| Cosmo vs Yoshimitsu | 3–1 | 75.00% |
| Cosmo vs Xiaoyu | 0–4 | 0.00% |
| Cosmo vs Asuka | 3–1 | 75.00% |
| Cosmo vs Panda | 4–0 | 100.00% |
| Cosmo vs Reina | 2–2 | 50.00% |
| Cosmo vs Victor | 4–0 | 100.00% |
| Cosmo vs Law | 2–1 | 66.67% |
| Cosmo vs Kuma | 1–2 | 33.33% |
| Cosmo vs Leroy | 2–1 | 66.67% |
| Cosmo vs Paul | 2–0 | 100.00% |
| Cosmo vs Nina | 2–0 | 100.00% |
| Cosmo vs Azucena | 1–1 | 50.00% |
| Cosmo vs Devil Jin | 1–0 | 100.00% |
| Cosmo vs Lili | 1–0 | 100.00% |
| Cosmo vs Claudio | 1–0 | 100.00% |
| Cosmo vs Raven | 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.