| HeartUnderblade vs King | 55–55 | 50.00% |
| HeartUnderblade vs Jin | 50–49 | 50.51% |
| HeartUnderblade vs Kazuya | 40–46 | 46.51% |
| HeartUnderblade vs Bryan | 29–38 | 43.28% |
| HeartUnderblade vs Dragunov | 35–27 | 56.45% |
| HeartUnderblade vs Law | 18–33 | 35.29% |
| HeartUnderblade vs Heihachi | 19–27 | 41.30% |
| HeartUnderblade vs Hwoarang | 18–19 | 48.65% |
| HeartUnderblade vs Yoshimitsu | 26–10 | 72.22% |
| HeartUnderblade vs Steve | 23–13 | 63.89% |
| HeartUnderblade vs Clive | 19–16 | 54.29% |
| HeartUnderblade vs Paul | 12–18 | 40.00% |
| HeartUnderblade vs Anna | 12–13 | 48.00% |
| HeartUnderblade vs Reina | 14–10 | 58.33% |
| HeartUnderblade vs Raven | 12–11 | 52.17% |
| HeartUnderblade vs Alisa | 6–14 | 30.00% |
| HeartUnderblade vs Asuka | 10–9 | 52.63% |
| HeartUnderblade vs Lili | 8–10 | 44.44% |
| HeartUnderblade vs Nina | 8–10 | 44.44% |
| HeartUnderblade vs Lee | 12–6 | 66.67% |
| HeartUnderblade vs Azucena | 11–7 | 61.11% |
| HeartUnderblade vs Fahkumram | 13–4 | 76.47% |
| HeartUnderblade vs Leroy | 15–1 | 93.75% |
| HeartUnderblade vs Victor | 11–5 | 68.75% |
| HeartUnderblade vs Armor King | 9–6 | 60.00% |
| HeartUnderblade vs Devil Jin | 9–5 | 64.29% |
| HeartUnderblade vs Claudio | 8–5 | 61.54% |
| HeartUnderblade vs Eddy | 10–2 | 83.33% |
| HeartUnderblade vs Jack-8 | 5–5 | 50.00% |
| HeartUnderblade vs Shaheen | 5–4 | 55.56% |
| HeartUnderblade vs Feng | 1–6 | 14.29% |
| HeartUnderblade vs Lars | 3–4 | 42.86% |
| HeartUnderblade vs Jun | 5–2 | 71.43% |
| HeartUnderblade vs Lidia | 3–3 | 50.00% |
| HeartUnderblade vs Kuma | 4–1 | 80.00% |
| HeartUnderblade vs Xiaoyu | 2–1 | 66.67% |
| HeartUnderblade vs Panda | 1–2 | 33.33% |
| HeartUnderblade vs Miary Zo | 1–2 | 33.33% |
| HeartUnderblade vs Leo | 0–2 | 0.00% |
| HeartUnderblade vs Zafina | 2–0 | 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.