| Marcus Grönholm vs Kazuya | 410–312 | 56.79% |
| Marcus Grönholm vs Bryan | 314–258 | 54.90% |
| Marcus Grönholm vs Jin | 311–247 | 55.73% |
| Marcus Grönholm vs Dragunov | 317–200 | 61.32% |
| Marcus Grönholm vs Lee | 279–214 | 56.59% |
| Marcus Grönholm vs King | 292–175 | 62.53% |
| Marcus Grönholm vs Reina | 229–203 | 53.01% |
| Marcus Grönholm vs Yoshimitsu | 238–169 | 58.48% |
| Marcus Grönholm vs Hwoarang | 201–196 | 50.63% |
| Marcus Grönholm vs Paul | 233–162 | 58.99% |
| Marcus Grönholm vs Heihachi | 190–179 | 51.49% |
| Marcus Grönholm vs Lili | 180–180 | 50.00% |
| Marcus Grönholm vs Steve | 195–150 | 56.52% |
| Marcus Grönholm vs Devil Jin | 218–113 | 65.86% |
| Marcus Grönholm vs Feng | 170–141 | 54.66% |
| Marcus Grönholm vs Leo | 154–128 | 54.61% |
| Marcus Grönholm vs Raven | 161–114 | 58.55% |
| Marcus Grönholm vs Nina | 126–132 | 48.84% |
| Marcus Grönholm vs Azucena | 137–115 | 54.37% |
| Marcus Grönholm vs Law | 112–135 | 45.34% |
| Marcus Grönholm vs Lars | 124–122 | 50.41% |
| Marcus Grönholm vs Victor | 126–95 | 57.01% |
| Marcus Grönholm vs Lidia | 95–117 | 44.81% |
| Marcus Grönholm vs Alisa | 120–86 | 58.25% |
| Marcus Grönholm vs Zafina | 120–86 | 58.25% |
| Marcus Grönholm vs Shaheen | 105–88 | 54.40% |
| Marcus Grönholm vs Eddy | 92–90 | 50.55% |
| Marcus Grönholm vs Asuka | 102–77 | 56.98% |
| Marcus Grönholm vs Jack-8 | 97–77 | 55.75% |
| Marcus Grönholm vs Jun | 94–79 | 54.34% |
| Marcus Grönholm vs Xiaoyu | 93–63 | 59.62% |
| Marcus Grönholm vs Claudio | 87–69 | 55.77% |
| Marcus Grönholm vs Clive | 84–59 | 58.74% |
| Marcus Grönholm vs Leroy | 60–73 | 45.11% |
| Marcus Grönholm vs Armor King | 68–60 | 53.12% |
| Marcus Grönholm vs Kuma | 62–45 | 57.94% |
| Marcus Grönholm vs Fahkumram | 38–58 | 39.58% |
| Marcus Grönholm vs Anna | 37–35 | 51.39% |
| Marcus Grönholm vs Panda | 33–31 | 51.56% |
| Marcus Grönholm vs Miary Zo | 23–24 | 48.94% |
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.