| Siom4ii vs Kazuya | 42–29 | 59.15% |
| Siom4ii vs Steve | 27–41 | 39.71% |
| Siom4ii vs Jin | 21–42 | 33.33% |
| Siom4ii vs Bryan | 27–36 | 42.86% |
| Siom4ii vs King | 21–36 | 36.84% |
| Siom4ii vs Lili | 25–23 | 52.08% |
| Siom4ii vs Yoshimitsu | 17–28 | 37.78% |
| Siom4ii vs Dragunov | 18–24 | 42.86% |
| Siom4ii vs Victor | 17–24 | 41.46% |
| Siom4ii vs Law | 14–23 | 37.84% |
| Siom4ii vs Clive | 20–17 | 54.05% |
| Siom4ii vs Jun | 7–28 | 20.00% |
| Siom4ii vs Reina | 22–11 | 66.67% |
| Siom4ii vs Heihachi | 10–21 | 32.26% |
| Siom4ii vs Alisa | 8–22 | 26.67% |
| Siom4ii vs Hwoarang | 13–14 | 48.15% |
| Siom4ii vs Eddy | 11–14 | 44.00% |
| Siom4ii vs Lars | 13–9 | 59.09% |
| Siom4ii vs Xiaoyu | 6–13 | 31.58% |
| Siom4ii vs Leroy | 8–11 | 42.11% |
| Siom4ii vs Paul | 4–13 | 23.53% |
| Siom4ii vs Asuka | 3–11 | 21.43% |
| Siom4ii vs Leo | 4–10 | 28.57% |
| Siom4ii vs Raven | 7–7 | 50.00% |
| Siom4ii vs Jack-8 | 3–10 | 23.08% |
| Siom4ii vs Lee | 5–8 | 38.46% |
| Siom4ii vs Nina | 5–7 | 41.67% |
| Siom4ii vs Azucena | 8–3 | 72.73% |
| Siom4ii vs Devil Jin | 3–6 | 33.33% |
| Siom4ii vs Feng | 5–4 | 55.56% |
| Siom4ii vs Claudio | 3–5 | 37.50% |
| Siom4ii vs Kuma | 2–5 | 28.57% |
| Siom4ii vs Lidia | 3–4 | 42.86% |
| Siom4ii vs Shaheen | 1–4 | 20.00% |
| Siom4ii vs Anna | 1–4 | 20.00% |
| Siom4ii vs Fahkumram | 3–2 | 60.00% |
| Siom4ii vs Panda | 2–2 | 50.00% |
| Siom4ii vs Zafina | 0–3 | 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.