| Siwsiw vs Law | 8–5 | 61.54% |
| Siwsiw vs Hwoarang | 9–4 | 69.23% |
| Siwsiw vs Bryan | 5–7 | 41.67% |
| Siwsiw vs King | 4–3 | 57.14% |
| Siwsiw vs Steve | 6–1 | 85.71% |
| Siwsiw vs Asuka | 5–1 | 83.33% |
| Siwsiw vs Lili | 4–2 | 66.67% |
| Siwsiw vs Jun | 4–2 | 66.67% |
| Siwsiw vs Jin | 4–0 | 100.00% |
| Siwsiw vs Kazuya | 3–1 | 75.00% |
| Siwsiw vs Clive | 1–3 | 25.00% |
| Siwsiw vs Feng | 2–1 | 66.67% |
| Siwsiw vs Lars | 3–0 | 100.00% |
| Siwsiw vs Zafina | 0–3 | 0.00% |
| Siwsiw vs Lidia | 3–0 | 100.00% |
| Siwsiw vs Heihachi | 2–1 | 66.67% |
| Siwsiw vs Yoshimitsu | 0–2 | 0.00% |
| Siwsiw vs Xiaoyu | 2–0 | 100.00% |
| Siwsiw vs Devil Jin | 2–0 | 100.00% |
| Siwsiw vs Claudio | 2–0 | 100.00% |
| Siwsiw vs Lee | 1–1 | 50.00% |
| Siwsiw vs Eddy | 2–0 | 100.00% |
| Siwsiw vs Paul | 1–0 | 100.00% |
| Siwsiw vs Dragunov | 0–1 | 0.00% |
| Siwsiw vs Reina | 1–0 | 100.00% |
| Siwsiw vs Victor | 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.