| Sion vs King | 236–282 | 45.56% |
| Sion vs Jin | 218–265 | 45.13% |
| Sion vs Kazuya | 210–222 | 48.61% |
| Sion vs Bryan | 201–197 | 50.50% |
| Sion vs Law | 159–236 | 40.25% |
| Sion vs Steve | 186–201 | 48.06% |
| Sion vs Hwoarang | 178–199 | 47.21% |
| Sion vs Reina | 162–194 | 45.51% |
| Sion vs Lili | 122–165 | 42.51% |
| Sion vs Lee | 128–145 | 46.89% |
| Sion vs Dragunov | 110–162 | 40.44% |
| Sion vs Jun | 121–145 | 45.49% |
| Sion vs Eddy | 145–119 | 54.92% |
| Sion vs Lars | 124–133 | 48.25% |
| Sion vs Azucena | 113–135–1 | 45.56% |
| Sion vs Yoshimitsu | 113–134 | 45.75% |
| Sion vs Asuka | 111–114 | 49.33% |
| Sion vs Paul | 102–117 | 46.58% |
| Sion vs Lidia | 116–92 | 55.77% |
| Sion vs Victor | 95–106 | 47.26% |
| Sion vs Feng | 85–107 | 44.27% |
| Sion vs Xiaoyu | 89–73 | 54.94% |
| Sion vs Alisa | 71–90 | 44.10% |
| Sion vs Leo | 75–80 | 48.39% |
| Sion vs Nina | 63–91 | 40.91% |
| Sion vs Raven | 80–74 | 51.95% |
| Sion vs Devil Jin | 57–77 | 42.54% |
| Sion vs Heihachi | 53–74 | 41.73% |
| Sion vs Jack-8 | 57–61 | 48.31% |
| Sion vs Leroy | 57–53 | 51.82% |
| Sion vs Clive | 52–52 | 50.00% |
| Sion vs Kuma | 40–54 | 42.55% |
| Sion vs Claudio | 41–49 | 45.56% |
| Sion vs Zafina | 28–47 | 37.33% |
| Sion vs Shaheen | 22–41 | 34.92% |
| Sion vs Panda | 22–29 | 43.14% |
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.