| gwain vs Dragunov | 10–8 | 55.56% |
| gwain vs Eddy | 11–6 | 64.71% |
| gwain vs King | 10–4 | 71.43% |
| gwain vs Victor | 7–7 | 50.00% |
| gwain vs Law | 8–5 | 61.54% |
| gwain vs Hwoarang | 6–4 | 60.00% |
| gwain vs Lee | 4–6 | 40.00% |
| gwain vs Steve | 8–1 | 88.89% |
| gwain vs Lili | 5–3 | 62.50% |
| gwain vs Jin | 2–5 | 28.57% |
| gwain vs Kazuya | 3–4 | 42.86% |
| gwain vs Zafina | 4–3 | 57.14% |
| gwain vs Paul | 3–3 | 50.00% |
| gwain vs Yoshimitsu | 5–1 | 83.33% |
| gwain vs Asuka | 4–2 | 66.67% |
| gwain vs Devil Jin | 3–3 | 50.00% |
| gwain vs Lars | 3–3 | 50.00% |
| gwain vs Azucena | 4–2 | 66.67% |
| gwain vs Xiaoyu | 4–1 | 80.00% |
| gwain vs Bryan | 4–1 | 80.00% |
| gwain vs Raven | 1–4 | 20.00% |
| gwain vs Alisa | 2–2 | 50.00% |
| gwain vs Jack-8 | 1–2 | 33.33% |
| gwain vs Feng | 3–0 | 100.00% |
| gwain vs Jun | 2–1 | 66.67% |
| gwain vs Leo | 0–2 | 0.00% |
| gwain vs Shaheen | 2–0 | 100.00% |
| gwain vs Kuma | 1–1 | 50.00% |
| gwain vs Leroy | 2–0 | 100.00% |
| gwain vs Reina | 2–0 | 100.00% |
| gwain vs Lidia | 2–0 | 100.00% |
| gwain vs Heihachi | 2–0 | 100.00% |
| gwain vs Armor King | 2–0 | 100.00% |
| gwain vs Miary Zo | 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.