| SiamBill vs Bryan | 322–286 | 52.96% |
| SiamBill vs King | 281–305 | 47.95% |
| SiamBill vs Hwoarang | 325–256 | 55.94% |
| SiamBill vs Dragunov | 303–271 | 52.79% |
| SiamBill vs Kazuya | 301–225 | 57.22% |
| SiamBill vs Reina | 237–218 | 52.09% |
| SiamBill vs Paul | 203–246 | 45.21% |
| SiamBill vs Jin | 228–193 | 54.16% |
| SiamBill vs Lili | 166–229 | 42.03% |
| SiamBill vs Steve | 194–200 | 49.24% |
| SiamBill vs Asuka | 172–218 | 44.10% |
| SiamBill vs Feng | 171–192 | 47.11% |
| SiamBill vs Yoshimitsu | 159–198 | 44.54% |
| SiamBill vs Victor | 159–196 | 44.79% |
| SiamBill vs Lars | 156–192 | 44.83% |
| SiamBill vs Law | 161–173 | 48.20% |
| SiamBill vs Nina | 151–166 | 47.63% |
| SiamBill vs Eddy | 165–149 | 52.55% |
| SiamBill vs Devil Jin | 149–164 | 47.60% |
| SiamBill vs Jun | 130–174 | 42.76% |
| SiamBill vs Lee | 142–159 | 47.18% |
| SiamBill vs Jack-8 | 140–149 | 48.44% |
| SiamBill vs Azucena | 154–135 | 53.29% |
| SiamBill vs Alisa | 129–148 | 46.57% |
| SiamBill vs Xiaoyu | 115–146 | 44.06% |
| SiamBill vs Lidia | 127–127 | 50.00% |
| SiamBill vs Leroy | 103–144 | 41.70% |
| SiamBill vs Leo | 110–119 | 48.03% |
| SiamBill vs Heihachi | 123–88 | 58.29% |
| SiamBill vs Claudio | 87–123 | 41.43% |
| SiamBill vs Shaheen | 95–89 | 51.63% |
| SiamBill vs Raven | 72–100 | 41.86% |
| SiamBill vs Kuma | 60–84 | 41.67% |
| SiamBill vs Zafina | 62–78 | 44.29% |
| SiamBill vs Clive | 46–74 | 38.33% |
| SiamBill vs Fahkumram | 59–50 | 54.13% |
| SiamBill vs Armor King | 49–54 | 47.57% |
| SiamBill vs Anna | 42–50 | 45.65% |
| SiamBill vs Panda | 27–40 | 40.30% |
| SiamBill vs Miary Zo | 9–15 | 37.50% |
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.