| HeartlessSystem vs Jin | 42–42 | 50.00% |
| HeartlessSystem vs King | 40–37 | 51.95% |
| HeartlessSystem vs Reina | 32–29 | 52.46% |
| HeartlessSystem vs Kazuya | 37–21 | 63.79% |
| HeartlessSystem vs Bryan | 25–21 | 54.35% |
| HeartlessSystem vs Steve | 26–17 | 60.47% |
| HeartlessSystem vs Law | 21–19 | 52.50% |
| HeartlessSystem vs Dragunov | 18–20 | 47.37% |
| HeartlessSystem vs Hwoarang | 15–21 | 41.67% |
| HeartlessSystem vs Devil Jin | 17–18 | 48.57% |
| HeartlessSystem vs Paul | 17–13 | 56.67% |
| HeartlessSystem vs Yoshimitsu | 10–18 | 35.71% |
| HeartlessSystem vs Heihachi | 7–21 | 25.00% |
| HeartlessSystem vs Lili | 14–11 | 56.00% |
| HeartlessSystem vs Asuka | 13–10 | 56.52% |
| HeartlessSystem vs Lee | 11–12 | 47.83% |
| HeartlessSystem vs Azucena | 10–13 | 43.48% |
| HeartlessSystem vs Feng | 14–4 | 77.78% |
| HeartlessSystem vs Lidia | 3–14 | 17.65% |
| HeartlessSystem vs Claudio | 10–6 | 62.50% |
| HeartlessSystem vs Nina | 10–6 | 62.50% |
| HeartlessSystem vs Eddy | 9–6 | 60.00% |
| HeartlessSystem vs Lars | 8–6 | 57.14% |
| HeartlessSystem vs Victor | 13–1 | 92.86% |
| HeartlessSystem vs Xiaoyu | 11–2 | 84.62% |
| HeartlessSystem vs Leo | 8–5 | 61.54% |
| HeartlessSystem vs Kuma | 5–7 | 41.67% |
| HeartlessSystem vs Alisa | 3–8 | 27.27% |
| HeartlessSystem vs Jack-8 | 5–3 | 62.50% |
| HeartlessSystem vs Zafina | 6–2 | 75.00% |
| HeartlessSystem vs Jun | 3–5 | 37.50% |
| HeartlessSystem vs Leroy | 5–2 | 71.43% |
| HeartlessSystem vs Fahkumram | 6–1 | 85.71% |
| HeartlessSystem vs Raven | 3–3 | 50.00% |
| HeartlessSystem vs Armor King | 2–4 | 33.33% |
| HeartlessSystem vs Clive | 3–2 | 60.00% |
| HeartlessSystem vs Shaheen | 1–3 | 25.00% |
| HeartlessSystem vs Anna | 1–3 | 25.00% |
| HeartlessSystem vs Miary Zo | 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.