| Heartless vs Steve | 38–23 | 62.30% |
| Heartless vs Bryan | 31–27 | 53.45% |
| Heartless vs Jin | 32–20 | 61.54% |
| Heartless vs Kazuya | 23–20 | 53.49% |
| Heartless vs Clive | 21–16 | 56.76% |
| Heartless vs King | 19–16 | 54.29% |
| Heartless vs Armor King | 23–9 | 71.88% |
| Heartless vs Heihachi | 19–12 | 61.29% |
| Heartless vs Lili | 14–13 | 51.85% |
| Heartless vs Hwoarang | 8–14 | 36.36% |
| Heartless vs Paul | 14–7 | 66.67% |
| Heartless vs Jun | 13–8 | 61.90% |
| Heartless vs Yoshimitsu | 4–14 | 22.22% |
| Heartless vs Dragunov | 4–14 | 22.22% |
| Heartless vs Nina | 7–9 | 43.75% |
| Heartless vs Reina | 13–3 | 81.25% |
| Heartless vs Lars | 4–9 | 30.77% |
| Heartless vs Law | 9–3 | 75.00% |
| Heartless vs Jack-8 | 7–5 | 58.33% |
| Heartless vs Claudio | 10–2 | 83.33% |
| Heartless vs Lee | 8–4 | 66.67% |
| Heartless vs Eddy | 6–5 | 54.55% |
| Heartless vs Victor | 6–4 | 60.00% |
| Heartless vs Zafina | 5–4 | 55.56% |
| Heartless vs Kuma | 6–2 | 75.00% |
| Heartless vs Azucena | 4–3 | 57.14% |
| Heartless vs Lidia | 5–2 | 71.43% |
| Heartless vs Asuka | 1–4 | 20.00% |
| Heartless vs Devil Jin | 3–2 | 60.00% |
| Heartless vs Xiaoyu | 3–1 | 75.00% |
| Heartless vs Feng | 4–0 | 100.00% |
| Heartless vs Miary Zo | 2–2 | 50.00% |
| Heartless vs Shaheen | 1–2 | 33.33% |
| Heartless vs Raven | 0–3 | 0.00% |
| Heartless vs Leo | 2–0 | 100.00% |
| Heartless vs Alisa | 2–0 | 100.00% |
| Heartless vs Anna | 1–0 | 100.00% |
| Heartless vs Fahkumram | 1–0 | 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.