| Grubassek vs Law | 9–8 | 52.94% |
| Grubassek vs King | 7–3 | 70.00% |
| Grubassek vs Yoshimitsu | 7–3 | 70.00% |
| Grubassek vs Jin | 9–1 | 90.00% |
| Grubassek vs Lee | 7–2 | 77.78% |
| Grubassek vs Kazuya | 5–3 | 62.50% |
| Grubassek vs Reina | 7–1 | 87.50% |
| Grubassek vs Bryan | 4–3 | 57.14% |
| Grubassek vs Asuka | 5–2 | 71.43% |
| Grubassek vs Eddy | 5–2 | 71.43% |
| Grubassek vs Jun | 6–0 | 100.00% |
| Grubassek vs Paul | 4–1 | 80.00% |
| Grubassek vs Hwoarang | 4–1 | 80.00% |
| Grubassek vs Lili | 4–1 | 80.00% |
| Grubassek vs Dragunov | 2–3 | 40.00% |
| Grubassek vs Azucena | 4–1 | 80.00% |
| Grubassek vs Victor | 1–4 | 20.00% |
| Grubassek vs Steve | 2–1 | 66.67% |
| Grubassek vs Jack-8 | 3–0 | 100.00% |
| Grubassek vs Nina | 0–3 | 0.00% |
| Grubassek vs Devil Jin | 2–0 | 100.00% |
| Grubassek vs Feng | 0–2 | 0.00% |
| Grubassek vs Leo | 2–0 | 100.00% |
| Grubassek vs Shaheen | 2–0 | 100.00% |
| Grubassek vs Xiaoyu | 1–0 | 100.00% |
| Grubassek vs Alisa | 1–0 | 100.00% |
| Grubassek vs Kuma | 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.