| Isaac vs Jin | 36–49 | 42.35% |
| Isaac vs Law | 37–34 | 52.11% |
| Isaac vs Armor King | 30–38 | 44.12% |
| Isaac vs Steve | 30–28 | 51.72% |
| Isaac vs King | 23–33 | 41.07% |
| Isaac vs Hwoarang | 23–33 | 41.07% |
| Isaac vs Kazuya | 21–21 | 50.00% |
| Isaac vs Jun | 20–14 | 58.82% |
| Isaac vs Reina | 18–15 | 54.55% |
| Isaac vs Heihachi | 13–20 | 39.39% |
| Isaac vs Bryan | 5–26 | 16.13% |
| Isaac vs Azucena | 13–17 | 43.33% |
| Isaac vs Nina | 18–10 | 64.29% |
| Isaac vs Eddy | 15–12 | 55.56% |
| Isaac vs Yoshimitsu | 11–13 | 45.83% |
| Isaac vs Lili | 13–10 | 56.52% |
| Isaac vs Dragunov | 8–15 | 34.78% |
| Isaac vs Paul | 10–10 | 50.00% |
| Isaac vs Devil Jin | 3–16 | 15.79% |
| Isaac vs Victor | 7–11 | 38.89% |
| Isaac vs Asuka | 12–5 | 70.59% |
| Isaac vs Lidia | 7–10 | 41.18% |
| Isaac vs Clive | 9–8 | 52.94% |
| Isaac vs Lee | 8–8 | 50.00% |
| Isaac vs Lars | 10–5 | 66.67% |
| Isaac vs Alisa | 7–6 | 53.85% |
| Isaac vs Leroy | 6–7 | 46.15% |
| Isaac vs Anna | 8–5 | 61.54% |
| Isaac vs Feng | 5–6 | 45.45% |
| Isaac vs Leo | 6–5 | 54.55% |
| Isaac vs Jack-8 | 4–6 | 40.00% |
| Isaac vs Miary Zo | 5–5 | 50.00% |
| Isaac vs Claudio | 3–6 | 33.33% |
| Isaac vs Shaheen | 4–5 | 44.44% |
| Isaac vs Fahkumram | 5–3 | 62.50% |
| Isaac vs Xiaoyu | 4–3 | 57.14% |
| Isaac vs Kuma | 4–3 | 57.14% |
| Isaac vs Zafina | 3–4 | 42.86% |
| Isaac vs Raven | 5–2 | 71.43% |
| Isaac vs Panda | 4–1 | 80.00% |
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.