| Siddal vs Jin | 33–20 | 62.26% |
| Siddal vs Kazuya | 32–21 | 60.38% |
| Siddal vs Bryan | 31–12 | 72.09% |
| Siddal vs Reina | 23–17 | 57.50% |
| Siddal vs Steve | 18–10 | 64.29% |
| Siddal vs Hwoarang | 16–11 | 59.26% |
| Siddal vs King | 15–9 | 62.50% |
| Siddal vs Dragunov | 14–10 | 58.33% |
| Siddal vs Eddy | 9–14 | 39.13% |
| Siddal vs Paul | 16–6 | 72.73% |
| Siddal vs Law | 14–5 | 73.68% |
| Siddal vs Yoshimitsu | 13–5 | 72.22% |
| Siddal vs Devil Jin | 9–9 | 50.00% |
| Siddal vs Feng | 13–5 | 72.22% |
| Siddal vs Lars | 9–7 | 56.25% |
| Siddal vs Asuka | 12–3 | 80.00% |
| Siddal vs Lee | 11–4 | 73.33% |
| Siddal vs Heihachi | 11–4 | 73.33% |
| Siddal vs Azucena | 5–8 | 38.46% |
| Siddal vs Alisa | 7–5 | 58.33% |
| Siddal vs Claudio | 7–5 | 58.33% |
| Siddal vs Xiaoyu | 6–5 | 54.55% |
| Siddal vs Leo | 5–6 | 45.45% |
| Siddal vs Jack-8 | 7–3 | 70.00% |
| Siddal vs Lili | 7–3 | 70.00% |
| Siddal vs Jun | 4–6 | 40.00% |
| Siddal vs Leroy | 4–5 | 44.44% |
| Siddal vs Zafina | 4–4 | 50.00% |
| Siddal vs Nina | 6–1 | 85.71% |
| Siddal vs Panda | 3–3 | 50.00% |
| Siddal vs Raven | 0–6 | 0.00% |
| Siddal vs Lidia | 2–3 | 40.00% |
| Siddal vs Clive | 2–2 | 50.00% |
| Siddal vs Victor | 1–2 | 33.33% |
| Siddal vs Shaheen | 0–2 | 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.