| Siwel vs King | 13–21 | 38.24% |
| Siwel vs Reina | 16–17 | 48.48% |
| Siwel vs Heihachi | 11–17 | 39.29% |
| Siwel vs Jin | 6–20 | 23.08% |
| Siwel vs Hwoarang | 5–20 | 20.00% |
| Siwel vs Law | 12–10 | 54.55% |
| Siwel vs Lili | 9–11 | 45.00% |
| Siwel vs Steve | 4–15 | 21.05% |
| Siwel vs Jun | 6–13 | 31.58% |
| Siwel vs Nina | 8–9 | 47.06% |
| Siwel vs Raven | 9–8 | 52.94% |
| Siwel vs Kazuya | 5–10 | 33.33% |
| Siwel vs Eddy | 4–11 | 26.67% |
| Siwel vs Asuka | 4–10 | 28.57% |
| Siwel vs Lars | 3–10 | 23.08% |
| Siwel vs Azucena | 5–7 | 41.67% |
| Siwel vs Victor | 5–7 | 41.67% |
| Siwel vs Lidia | 9–3 | 75.00% |
| Siwel vs Yoshimitsu | 4–6 | 40.00% |
| Siwel vs Dragunov | 6–4 | 60.00% |
| Siwel vs Paul | 1–8 | 11.11% |
| Siwel vs Lee | 4–5 | 44.44% |
| Siwel vs Leroy | 2–7 | 22.22% |
| Siwel vs Xiaoyu | 4–4 | 50.00% |
| Siwel vs Bryan | 5–3 | 62.50% |
| Siwel vs Devil Jin | 2–5 | 28.57% |
| Siwel vs Kuma | 1–6 | 14.29% |
| Siwel vs Leo | 2–4 | 33.33% |
| Siwel vs Claudio | 1–5 | 16.67% |
| Siwel vs Fahkumram | 2–4 | 33.33% |
| Siwel vs Alisa | 1–4 | 20.00% |
| Siwel vs Miary Zo | 3–2 | 60.00% |
| Siwel vs Feng | 0–4 | 0.00% |
| Siwel vs Shaheen | 1–3 | 25.00% |
| Siwel vs Jack-8 | 2–1 | 66.67% |
| Siwel vs Armor King | 0–2 | 0.00% |
| Siwel vs Clive | 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.