| Siwoo vs Bryan | 27–3 | 90.00% |
| Siwoo vs Dragunov | 23–3 | 88.46% |
| Siwoo vs Fahkumram | 17–4 | 80.95% |
| Siwoo vs Kazuya | 15–4 | 78.95% |
| Siwoo vs Armor King | 12–6 | 66.67% |
| Siwoo vs Asuka | 11–6 | 64.71% |
| Siwoo vs Miary Zo | 13–4 | 76.47% |
| Siwoo vs King | 14–0 | 100.00% |
| Siwoo vs Heihachi | 10–4 | 71.43% |
| Siwoo vs Steve | 12–1 | 92.31% |
| Siwoo vs Reina | 9–2 | 81.82% |
| Siwoo vs Jun | 9–1 | 90.00% |
| Siwoo vs Lidia | 5–5 | 50.00% |
| Siwoo vs Jin | 7–2 | 77.78% |
| Siwoo vs Lee | 6–3 | 66.67% |
| Siwoo vs Victor | 9–0 | 100.00% |
| Siwoo vs Hwoarang | 7–1 | 87.50% |
| Siwoo vs Yoshimitsu | 7–0 | 100.00% |
| Siwoo vs Nina | 6–1 | 85.71% |
| Siwoo vs Raven | 7–0 | 100.00% |
| Siwoo vs Xiaoyu | 6–0 | 100.00% |
| Siwoo vs Anna | 6–0 | 100.00% |
| Siwoo vs Law | 3–2 | 60.00% |
| Siwoo vs Lars | 5–0 | 100.00% |
| Siwoo vs Claudio | 4–1 | 80.00% |
| Siwoo vs Clive | 4–1 | 80.00% |
| Siwoo vs Paul | 3–1 | 75.00% |
| Siwoo vs Lili | 4–0 | 100.00% |
| Siwoo vs Devil Jin | 3–0 | 100.00% |
| Siwoo vs Feng | 3–0 | 100.00% |
| Siwoo vs Leo | 3–0 | 100.00% |
| Siwoo vs Shaheen | 3–0 | 100.00% |
| Siwoo vs Leroy | 2–1 | 66.67% |
| Siwoo vs Azucena | 1–2 | 33.33% |
| Siwoo vs Jack-8 | 2–0 | 100.00% |
| Siwoo vs Alisa | 2–0 | 100.00% |
| Siwoo vs Kuma | 0–1 | 0.00% |
| Siwoo vs Zafina | 1–0 | 100.00% |
| Siwoo vs Eddy | 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.