| Sierra vs Kazuya | 21–42 | 33.33% |
| Sierra vs Jin | 19–28 | 40.43% |
| Sierra vs Dragunov | 26–19 | 57.78% |
| Sierra vs Bryan | 21–23 | 47.73% |
| Sierra vs Armor King | 12–28 | 30.00% |
| Sierra vs Reina | 22–16 | 57.89% |
| Sierra vs King | 16–18 | 47.06% |
| Sierra vs Steve | 15–15 | 50.00% |
| Sierra vs Lili | 14–13 | 51.85% |
| Sierra vs Victor | 20–6 | 76.92% |
| Sierra vs Asuka | 14–11 | 56.00% |
| Sierra vs Lars | 5–15 | 25.00% |
| Sierra vs Yoshimitsu | 7–11 | 38.89% |
| Sierra vs Hwoarang | 11–7 | 61.11% |
| Sierra vs Fahkumram | 10–7 | 58.82% |
| Sierra vs Claudio | 6–10 | 37.50% |
| Sierra vs Raven | 2–14 | 12.50% |
| Sierra vs Heihachi | 8–7 | 53.33% |
| Sierra vs Paul | 4–10 | 28.57% |
| Sierra vs Devil Jin | 8–6 | 57.14% |
| Sierra vs Jun | 6–8 | 42.86% |
| Sierra vs Shaheen | 5–8 | 38.46% |
| Sierra vs Eddy | 9–3 | 75.00% |
| Sierra vs Leo | 6–5 | 54.55% |
| Sierra vs Law | 5–5 | 50.00% |
| Sierra vs Azucena | 6–4 | 60.00% |
| Sierra vs Jack-8 | 4–5 | 44.44% |
| Sierra vs Nina | 4–5 | 44.44% |
| Sierra vs Lidia | 1–8 | 11.11% |
| Sierra vs Feng | 3–5 | 37.50% |
| Sierra vs Clive | 6–2 | 75.00% |
| Sierra vs Xiaoyu | 4–2 | 66.67% |
| Sierra vs Alisa | 3–2 | 60.00% |
| Sierra vs Lee | 2–3 | 40.00% |
| Sierra vs Zafina | 2–3 | 40.00% |
| Sierra vs Anna | 2–1 | 66.67% |
| Sierra vs Kuma | 2–0 | 100.00% |
| Sierra vs Leroy | 2–0 | 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.