| Isaa vs King | 5–12 | 29.41% |
| Isaa vs Jin | 4–10 | 28.57% |
| Isaa vs Jack-8 | 5–5–1 | 50.00% |
| Isaa vs Yoshimitsu | 6–4 | 60.00% |
| Isaa vs Kazuya | 5–4 | 55.56% |
| Isaa vs Leroy | 4–5 | 44.44% |
| Isaa vs Lidia | 4–5 | 44.44% |
| Isaa vs Armor King | 2–7 | 22.22% |
| Isaa vs Paul | 4–4 | 50.00% |
| Isaa vs Law | 4–4 | 50.00% |
| Isaa vs Asuka | 3–5 | 37.50% |
| Isaa vs Reina | 4–3 | 57.14% |
| Isaa vs Devil Jin | 5–1 | 83.33% |
| Isaa vs Hwoarang | 2–3 | 40.00% |
| Isaa vs Dragunov | 1–4 | 20.00% |
| Isaa vs Shaheen | 2–3 | 40.00% |
| Isaa vs Panda | 2–3 | 40.00% |
| Isaa vs Jun | 4–1 | 80.00% |
| Isaa vs Victor | 3–2 | 60.00% |
| Isaa vs Anna | 0–4 | 0.00% |
| Isaa vs Lili | 3–0 | 100.00% |
| Isaa vs Leo | 2–1 | 66.67% |
| Isaa vs Claudio | 2–1 | 66.67% |
| Isaa vs Kuma | 2–1 | 66.67% |
| Isaa vs Heihachi | 2–1 | 66.67% |
| Isaa vs Steve | 2–0 | 100.00% |
| Isaa vs Lee | 2–0 | 100.00% |
| Isaa vs Clive | 2–0 | 100.00% |
| Isaa vs Fahkumram | 2–0 | 100.00% |
| Isaa vs Raven | 0–1 | 0.00% |
| Isaa vs Eddy | 0–1 | 0.00% |
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.