| Siwa vs Kazuya | 121–128 | 48.59% |
| Siwa vs Bryan | 101–146 | 40.89% |
| Siwa vs Hwoarang | 113–119 | 48.71% |
| Siwa vs Dragunov | 84–112 | 42.86% |
| Siwa vs King | 92–99 | 48.17% |
| Siwa vs Paul | 70–90 | 43.75% |
| Siwa vs Steve | 79–73 | 51.97% |
| Siwa vs Jin | 68–82 | 45.33% |
| Siwa vs Reina | 75–71 | 51.37% |
| Siwa vs Asuka | 59–66 | 47.20% |
| Siwa vs Lili | 54–71 | 43.20% |
| Siwa vs Law | 40–65 | 38.10% |
| Siwa vs Leroy | 46–57 | 44.66% |
| Siwa vs Anna | 49–54 | 47.57% |
| Siwa vs Jun | 43–56 | 43.43% |
| Siwa vs Azucena | 41–58 | 41.41% |
| Siwa vs Lars | 42–55 | 43.30% |
| Siwa vs Yoshimitsu | 43–49 | 46.74% |
| Siwa vs Victor | 43–48 | 47.25% |
| Siwa vs Xiaoyu | 45–41 | 52.33% |
| Siwa vs Feng | 42–41 | 50.60% |
| Siwa vs Devil Jin | 39–42 | 48.15% |
| Siwa vs Heihachi | 31–50 | 38.27% |
| Siwa vs Nina | 39–40 | 49.37% |
| Siwa vs Lee | 35–43 | 44.87% |
| Siwa vs Alisa | 30–44 | 40.54% |
| Siwa vs Jack-8 | 34–38 | 47.22% |
| Siwa vs Claudio | 24–43 | 35.82% |
| Siwa vs Fahkumram | 37–27 | 57.81% |
| Siwa vs Raven | 22–39 | 36.07% |
| Siwa vs Leo | 30–30 | 50.00% |
| Siwa vs Lidia | 30–29 | 50.85% |
| Siwa vs Eddy | 20–36 | 35.71% |
| Siwa vs Clive | 20–17 | 54.05% |
| Siwa vs Shaheen | 18–17 | 51.43% |
| Siwa vs Zafina | 17–14 | 54.84% |
| Siwa vs Kuma | 12–18 | 40.00% |
| Siwa vs Panda | 14–12 | 53.85% |
| Siwa vs Miary Zo | 4–1 | 80.00% |
| Siwa vs Armor King | 1–2 | 33.33% |
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.