| Grandpa Joe vs King | 31–20 | 60.78% |
| Grandpa Joe vs Jin | 20–20 | 50.00% |
| Grandpa Joe vs Kazuya | 9–23 | 28.12% |
| Grandpa Joe vs Jun | 14–14 | 50.00% |
| Grandpa Joe vs Reina | 13–14 | 48.15% |
| Grandpa Joe vs Paul | 6–19 | 24.00% |
| Grandpa Joe vs Bryan | 7–17 | 29.17% |
| Grandpa Joe vs Hwoarang | 6–15 | 28.57% |
| Grandpa Joe vs Steve | 14–7 | 66.67% |
| Grandpa Joe vs Dragunov | 9–11 | 45.00% |
| Grandpa Joe vs Azucena | 9–8 | 52.94% |
| Grandpa Joe vs Law | 8–8 | 50.00% |
| Grandpa Joe vs Yoshimitsu | 11–5 | 68.75% |
| Grandpa Joe vs Asuka | 10–4 | 71.43% |
| Grandpa Joe vs Lidia | 7–7 | 50.00% |
| Grandpa Joe vs Nina | 8–5 | 61.54% |
| Grandpa Joe vs Lili | 5–7 | 41.67% |
| Grandpa Joe vs Alisa | 4–8 | 33.33% |
| Grandpa Joe vs Lee | 8–4 | 66.67% |
| Grandpa Joe vs Clive | 4–8 | 33.33% |
| Grandpa Joe vs Devil Jin | 2–9 | 18.18% |
| Grandpa Joe vs Victor | 6–5 | 54.55% |
| Grandpa Joe vs Xiaoyu | 5–4 | 55.56% |
| Grandpa Joe vs Feng | 3–4 | 42.86% |
| Grandpa Joe vs Leroy | 4–3 | 57.14% |
| Grandpa Joe vs Raven | 6–1 | 85.71% |
| Grandpa Joe vs Kuma | 4–2 | 66.67% |
| Grandpa Joe vs Heihachi | 2–4 | 33.33% |
| Grandpa Joe vs Jack-8 | 2–3 | 40.00% |
| Grandpa Joe vs Eddy | 2–3 | 40.00% |
| Grandpa Joe vs Anna | 2–2 | 50.00% |
| Grandpa Joe vs Miary Zo | 3–1 | 75.00% |
| Grandpa Joe vs Claudio | 2–1 | 66.67% |
| Grandpa Joe vs Armor King | 2–1 | 66.67% |
| Grandpa Joe vs Zafina | 1–1 | 50.00% |
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.