| Sierba vs Kazuya | 33–15 | 68.75% |
| Sierba vs Jin | 25–17 | 59.52% |
| Sierba vs Heihachi | 19–21 | 47.50% |
| Sierba vs Steve | 16–21 | 43.24% |
| Sierba vs Dragunov | 16–21 | 43.24% |
| Sierba vs Bryan | 18–15 | 54.55% |
| Sierba vs Lili | 19–10 | 65.52% |
| Sierba vs King | 12–16 | 42.86% |
| Sierba vs Reina | 12–16 | 42.86% |
| Sierba vs Armor King | 15–13 | 53.57% |
| Sierba vs Devil Jin | 10–15 | 40.00% |
| Sierba vs Lars | 10–13 | 43.48% |
| Sierba vs Victor | 11–11 | 50.00% |
| Sierba vs Hwoarang | 11–10 | 52.38% |
| Sierba vs Fahkumram | 11–10 | 52.38% |
| Sierba vs Azucena | 10–9 | 52.63% |
| Sierba vs Eddy | 7–12 | 36.84% |
| Sierba vs Law | 10–8 | 55.56% |
| Sierba vs Alisa | 8–10 | 44.44% |
| Sierba vs Nina | 10–8 | 55.56% |
| Sierba vs Asuka | 11–6 | 64.71% |
| Sierba vs Lee | 9–5 | 64.29% |
| Sierba vs Feng | 5–8 | 38.46% |
| Sierba vs Leo | 7–5 | 58.33% |
| Sierba vs Yoshimitsu | 7–4 | 63.64% |
| Sierba vs Claudio | 5–6 | 45.45% |
| Sierba vs Anna | 7–4 | 63.64% |
| Sierba vs Paul | 3–5 | 37.50% |
| Sierba vs Leroy | 1–6 | 14.29% |
| Sierba vs Jun | 6–1 | 85.71% |
| Sierba vs Clive | 5–2 | 71.43% |
| Sierba vs Shaheen | 0–4 | 0.00% |
| Sierba vs Jack-8 | 0–3 | 0.00% |
| Sierba vs Kuma | 2–1 | 66.67% |
| Sierba vs Miary Zo | 2–1 | 66.67% |
| Sierba vs Panda | 0–2 | 0.00% |
| Sierba vs Lidia | 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.