| Slack vs King | 31–48 | 39.24% |
| Slack vs Kazuya | 31–36 | 46.27% |
| Slack vs Hwoarang | 30–27 | 52.63% |
| Slack vs Bryan | 28–27 | 50.91% |
| Slack vs Eddy | 19–26 | 42.22% |
| Slack vs Steve | 25–19 | 56.82% |
| Slack vs Reina | 21–21 | 50.00% |
| Slack vs Jin | 16–22 | 42.11% |
| Slack vs Paul | 16–21 | 43.24% |
| Slack vs Yoshimitsu | 20–16 | 55.56% |
| Slack vs Jun | 13–18 | 41.94% |
| Slack vs Law | 11–18 | 37.93% |
| Slack vs Lee | 11–16 | 40.74% |
| Slack vs Lars | 11–14 | 44.00% |
| Slack vs Dragunov | 5–15 | 25.00% |
| Slack vs Devil Jin | 9–9 | 50.00% |
| Slack vs Victor | 12–6 | 66.67% |
| Slack vs Alisa | 5–10 | 33.33% |
| Slack vs Feng | 2–11 | 15.38% |
| Slack vs Kuma | 4–7 | 36.36% |
| Slack vs Raven | 5–6 | 45.45% |
| Slack vs Lili | 4–6 | 40.00% |
| Slack vs Nina | 3–7 | 30.00% |
| Slack vs Azucena | 3–5 | 37.50% |
| Slack vs Xiaoyu | 2–5 | 28.57% |
| Slack vs Jack-8 | 4–3 | 57.14% |
| Slack vs Asuka | 2–5 | 28.57% |
| Slack vs Leroy | 2–4 | 33.33% |
| Slack vs Leo | 2–3 | 40.00% |
| Slack vs Claudio | 2–1 | 66.67% |
| Slack vs Lidia | 1–2 | 33.33% |
| Slack vs Shaheen | 2–0 | 100.00% |
| Slack vs Panda | 0–1 | 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.