| IronGrandpa vs Reina | 90–73 | 55.21% |
| IronGrandpa vs Heihachi | 69–70 | 49.64% |
| IronGrandpa vs Jin | 69–67 | 50.74% |
| IronGrandpa vs King | 67–67 | 50.00% |
| IronGrandpa vs Kazuya | 59–71 | 45.38% |
| IronGrandpa vs Law | 71–52 | 57.72% |
| IronGrandpa vs Bryan | 64–54 | 54.24% |
| IronGrandpa vs Yoshimitsu | 40–69 | 36.70% |
| IronGrandpa vs Hwoarang | 41–66 | 38.32% |
| IronGrandpa vs Dragunov | 44–53 | 45.36% |
| IronGrandpa vs Paul | 47–45 | 51.09% |
| IronGrandpa vs Steve | 41–45 | 47.67% |
| IronGrandpa vs Azucena | 32–48 | 40.00% |
| IronGrandpa vs Lili | 41–38 | 51.90% |
| IronGrandpa vs Lee | 31–41 | 43.06% |
| IronGrandpa vs Jun | 28–42 | 40.00% |
| IronGrandpa vs Xiaoyu | 30–39 | 43.48% |
| IronGrandpa vs Victor | 37–32 | 53.62% |
| IronGrandpa vs Feng | 26–42 | 38.24% |
| IronGrandpa vs Asuka | 31–36 | 46.27% |
| IronGrandpa vs Lars | 37–30 | 55.22% |
| IronGrandpa vs Devil Jin | 34–30 | 53.12% |
| IronGrandpa vs Raven | 31–26 | 54.39% |
| IronGrandpa vs Eddy | 25–25 | 50.00% |
| IronGrandpa vs Leroy | 23–25 | 47.92% |
| IronGrandpa vs Nina | 14–32 | 30.43% |
| IronGrandpa vs Leo | 16–29 | 35.56% |
| IronGrandpa vs Kuma | 16–19 | 45.71% |
| IronGrandpa vs Alisa | 12–21 | 36.36% |
| IronGrandpa vs Zafina | 15–18 | 45.45% |
| IronGrandpa vs Jack-8 | 15–17 | 46.88% |
| IronGrandpa vs Shaheen | 9–23 | 28.12% |
| IronGrandpa vs Claudio | 10–18 | 35.71% |
| IronGrandpa vs Panda | 9–17 | 34.62% |
| IronGrandpa vs Lidia | 11–15 | 42.31% |
| IronGrandpa vs Fahkumram | 9–16 | 36.00% |
| IronGrandpa vs Clive | 16–8 | 66.67% |
| IronGrandpa vs Anna | 4–7 | 36.36% |
| IronGrandpa vs Armor King | 0–4 | 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.