| OldSiris vs Steve | 7–11 | 38.89% |
| OldSiris vs King | 4–10 | 28.57% |
| OldSiris vs Clive | 7–6 | 53.85% |
| OldSiris vs Jin | 7–5 | 58.33% |
| OldSiris vs Law | 4–6 | 40.00% |
| OldSiris vs Kazuya | 5–5 | 50.00% |
| OldSiris vs Hwoarang | 6–3 | 66.67% |
| OldSiris vs Reina | 4–5 | 44.44% |
| OldSiris vs Devil Jin | 3–5 | 37.50% |
| OldSiris vs Dragunov | 5–3 | 62.50% |
| OldSiris vs Bryan | 4–3 | 57.14% |
| OldSiris vs Asuka | 2–4 | 33.33% |
| OldSiris vs Lili | 1–5 | 16.67% |
| OldSiris vs Lee | 5–1 | 83.33% |
| OldSiris vs Paul | 3–2 | 60.00% |
| OldSiris vs Yoshimitsu | 3–2 | 60.00% |
| OldSiris vs Nina | 1–4 | 20.00% |
| OldSiris vs Azucena | 1–4 | 20.00% |
| OldSiris vs Victor | 3–1 | 75.00% |
| OldSiris vs Feng | 2–1 | 66.67% |
| OldSiris vs Leroy | 1–2 | 33.33% |
| OldSiris vs Lidia | 2–1 | 66.67% |
| OldSiris vs Fahkumram | 0–3 | 0.00% |
| OldSiris vs Lars | 1–1 | 50.00% |
| OldSiris vs Jun | 1–1 | 50.00% |
| OldSiris vs Eddy | 0–2 | 0.00% |
| OldSiris vs Anna | 0–2 | 0.00% |
| OldSiris vs Xiaoyu | 1–0 | 100.00% |
| OldSiris vs Jack-8 | 1–0 | 100.00% |
| OldSiris vs Raven | 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.