| Old Demon King vs Reina | 19–16 | 54.29% |
| Old Demon King vs Kazuya | 18–13 | 58.06% |
| Old Demon King vs Hwoarang | 18–11 | 62.07% |
| Old Demon King vs Jin | 14–14 | 50.00% |
| Old Demon King vs King | 13–9 | 59.09% |
| Old Demon King vs Law | 12–8 | 60.00% |
| Old Demon King vs Bryan | 7–10 | 41.18% |
| Old Demon King vs Eddy | 10–7 | 58.82% |
| Old Demon King vs Lidia | 6–11 | 35.29% |
| Old Demon King vs Alisa | 11–5 | 68.75% |
| Old Demon King vs Yoshimitsu | 9–6 | 60.00% |
| Old Demon King vs Jun | 10–5 | 66.67% |
| Old Demon King vs Paul | 8–6 | 57.14% |
| Old Demon King vs Azucena | 11–3 | 78.57% |
| Old Demon King vs Steve | 7–6 | 53.85% |
| Old Demon King vs Dragunov | 8–4 | 66.67% |
| Old Demon King vs Leo | 6–6 | 50.00% |
| Old Demon King vs Asuka | 6–5 | 54.55% |
| Old Demon King vs Victor | 7–4 | 63.64% |
| Old Demon King vs Xiaoyu | 7–2 | 77.78% |
| Old Demon King vs Lili | 7–2 | 77.78% |
| Old Demon King vs Nina | 8–1 | 88.89% |
| Old Demon King vs Feng | 6–2 | 75.00% |
| Old Demon King vs Claudio | 5–3 | 62.50% |
| Old Demon King vs Heihachi | 1–7 | 12.50% |
| Old Demon King vs Devil Jin | 5–2 | 71.43% |
| Old Demon King vs Shaheen | 2–5 | 28.57% |
| Old Demon King vs Lars | 4–1 | 80.00% |
| Old Demon King vs Lee | 2–3 | 40.00% |
| Old Demon King vs Kuma | 2–2 | 50.00% |
| Old Demon King vs Jack-8 | 0–3 | 0.00% |
| Old Demon King vs Leroy | 2–1 | 66.67% |
| Old Demon King vs Raven | 1–2 | 33.33% |
| Old Demon King vs Panda | 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.