| Isaiah Kool vs Jin | 4–5 | 44.44% |
| Isaiah Kool vs Steve | 4–5 | 44.44% |
| Isaiah Kool vs Xiaoyu | 6–2 | 75.00% |
| Isaiah Kool vs Lili | 2–5 | 28.57% |
| Isaiah Kool vs Law | 2–4 | 33.33% |
| Isaiah Kool vs Jun | 0–5 | 0.00% |
| Isaiah Kool vs King | 0–4 | 0.00% |
| Isaiah Kool vs Fahkumram | 1–3 | 25.00% |
| Isaiah Kool vs Hwoarang | 1–2 | 33.33% |
| Isaiah Kool vs Feng | 1–2 | 33.33% |
| Isaiah Kool vs Claudio | 2–1 | 66.67% |
| Isaiah Kool vs Reina | 2–1 | 66.67% |
| Isaiah Kool vs Victor | 1–2 | 33.33% |
| Isaiah Kool vs Eddy | 0–3 | 0.00% |
| Isaiah Kool vs Heihachi | 0–3 | 0.00% |
| Isaiah Kool vs Yoshimitsu | 0–2 | 0.00% |
| Isaiah Kool vs Kazuya | 0–2 | 0.00% |
| Isaiah Kool vs Leo | 0–2 | 0.00% |
| Isaiah Kool vs Nina | 0–2 | 0.00% |
| Isaiah Kool vs Panda | 2–0 | 100.00% |
| Isaiah Kool vs Raven | 1–1 | 50.00% |
| Isaiah Kool vs Anna | 1–1 | 50.00% |
| Isaiah Kool vs Jack-8 | 0–1 | 0.00% |
| Isaiah Kool vs Devil Jin | 1–0 | 100.00% |
| Isaiah Kool vs Lars | 0–1 | 0.00% |
| Isaiah Kool vs Zafina | 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.