| Sierf vs King | 108–126 | 46.15% |
| Sierf vs Kazuya | 95–133 | 41.67% |
| Sierf vs Reina | 120–105 | 53.33% |
| Sierf vs Steve | 95–114 | 45.45% |
| Sierf vs Jin | 132–65 | 67.01% |
| Sierf vs Clive | 63–80 | 44.06% |
| Sierf vs Law | 50–69 | 42.02% |
| Sierf vs Bryan | 32–83 | 27.83% |
| Sierf vs Hwoarang | 48–66 | 42.11% |
| Sierf vs Eddy | 37–69 | 34.91% |
| Sierf vs Heihachi | 40–62 | 39.22% |
| Sierf vs Asuka | 39–61 | 39.00% |
| Sierf vs Azucena | 46–49 | 48.42% |
| Sierf vs Jun | 35–55 | 38.89% |
| Sierf vs Lili | 32–54 | 37.21% |
| Sierf vs Dragunov | 33–52 | 38.82% |
| Sierf vs Victor | 31–52 | 37.35% |
| Sierf vs Xiaoyu | 28–51 | 35.44% |
| Sierf vs Devil Jin | 35–43 | 44.87% |
| Sierf vs Nina | 31–45 | 40.79% |
| Sierf vs Lars | 27–33 | 45.00% |
| Sierf vs Lee | 26–33 | 44.07% |
| Sierf vs Yoshimitsu | 21–34 | 38.18% |
| Sierf vs Fahkumram | 20–30 | 40.00% |
| Sierf vs Lidia | 22–26 | 45.83% |
| Sierf vs Paul | 12–35 | 25.53% |
| Sierf vs Feng | 9–38 | 19.15% |
| Sierf vs Leroy | 18–28 | 39.13% |
| Sierf vs Armor King | 20–25 | 44.44% |
| Sierf vs Leo | 18–26 | 40.91% |
| Sierf vs Claudio | 18–23 | 43.90% |
| Sierf vs Anna | 13–26 | 33.33% |
| Sierf vs Jack-8 | 19–18 | 51.35% |
| Sierf vs Kuma | 10–16 | 38.46% |
| Sierf vs Alisa | 8–17 | 32.00% |
| Sierf vs Panda | 12–7 | 63.16% |
| Sierf vs Zafina | 3–14 | 17.65% |
| Sierf vs Miary Zo | 9–5 | 64.29% |
| Sierf vs Shaheen | 3–8 | 27.27% |
| Sierf vs Raven | 8–2 | 80.00% |
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.