| Sierra vs Kazuya | 268–217 | 55.26% |
| Sierra vs Dragunov | 245–200 | 55.06% |
| Sierra vs Bryan | 240–197 | 54.92% |
| Sierra vs Jin | 207–183 | 53.08% |
| Sierra vs Steve | 202–172 | 54.01% |
| Sierra vs Hwoarang | 181–158–1 | 53.39% |
| Sierra vs Paul | 157–154 | 50.48% |
| Sierra vs Heihachi | 148–152 | 49.33% |
| Sierra vs Armor King | 141–133 | 51.46% |
| Sierra vs Clive | 149–107 | 58.20% |
| Sierra vs King | 135–118 | 53.36% |
| Sierra vs Lars | 142–111 | 56.13% |
| Sierra vs Devil Jin | 148–99 | 59.92% |
| Sierra vs Jack-8 | 128–105 | 54.94% |
| Sierra vs Lee | 116–107 | 52.02% |
| Sierra vs Reina | 136–87 | 60.99% |
| Sierra vs Victor | 145–64 | 69.38% |
| Sierra vs Law | 104–104 | 50.00% |
| Sierra vs Feng | 113–94 | 54.59% |
| Sierra vs Azucena | 92–103 | 47.18% |
| Sierra vs Asuka | 78–110 | 41.49% |
| Sierra vs Claudio | 86–95 | 47.51% |
| Sierra vs Fahkumram | 93–77 | 54.71% |
| Sierra vs Shaheen | 88–75 | 53.99% |
| Sierra vs Lili | 84–77 | 52.17% |
| Sierra vs Leroy | 75–74 | 50.34% |
| Sierra vs Yoshimitsu | 66–81 | 44.90% |
| Sierra vs Nina | 56–81 | 40.88% |
| Sierra vs Leo | 49–84 | 36.84% |
| Sierra vs Raven | 73–57 | 56.15% |
| Sierra vs Eddy | 84–46 | 64.62% |
| Sierra vs Jun | 68–58 | 53.97% |
| Sierra vs Xiaoyu | 46–73 | 38.66% |
| Sierra vs Zafina | 53–65 | 44.92% |
| Sierra vs Anna | 63–50 | 55.75% |
| Sierra vs Alisa | 53–46 | 53.54% |
| Sierra vs Lidia | 39–59 | 39.80% |
| Sierra vs Miary Zo | 45–46 | 49.45% |
| Sierra vs Kuma | 40–42 | 48.78% |
| Sierra vs Panda | 34–34 | 50.00% |
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.