| Efay vs Kazuya | 206–196 | 51.24% |
| Efay vs Bryan | 199–178 | 52.79% |
| Efay vs King | 175–150 | 53.85% |
| Efay vs Jin | 179–137 | 56.65% |
| Efay vs Reina | 148–127 | 53.82% |
| Efay vs Steve | 142–127 | 52.79% |
| Efay vs Hwoarang | 123–138 | 47.13% |
| Efay vs Law | 133–104 | 56.12% |
| Efay vs Heihachi | 121–110 | 52.38% |
| Efay vs Yoshimitsu | 120–110 | 52.17% |
| Efay vs Lili | 122–98 | 55.45% |
| Efay vs Dragunov | 86–114 | 43.00% |
| Efay vs Xiaoyu | 76–98 | 43.68% |
| Efay vs Lee | 77–96 | 44.51% |
| Efay vs Asuka | 98–74 | 56.98% |
| Efay vs Jun | 71–95 | 42.77% |
| Efay vs Paul | 74–83 | 47.13% |
| Efay vs Devil Jin | 81–76 | 51.59% |
| Efay vs Lars | 72–76 | 48.65% |
| Efay vs Azucena | 59–76 | 43.70% |
| Efay vs Jack-8 | 71–56 | 55.91% |
| Efay vs Lidia | 65–52 | 55.56% |
| Efay vs Nina | 52–63 | 45.22% |
| Efay vs Victor | 59–53 | 52.68% |
| Efay vs Leo | 45–60 | 42.86% |
| Efay vs Alisa | 42–56 | 42.86% |
| Efay vs Feng | 51–44 | 53.68% |
| Efay vs Leroy | 40–45 | 47.06% |
| Efay vs Kuma | 34–49 | 40.96% |
| Efay vs Eddy | 33–49 | 40.24% |
| Efay vs Raven | 38–39 | 49.35% |
| Efay vs Claudio | 42–34 | 55.26% |
| Efay vs Zafina | 26–47 | 35.62% |
| Efay vs Clive | 20–45 | 30.77% |
| Efay vs Shaheen | 23–39 | 37.10% |
| Efay vs Panda | 8–18 | 30.77% |
| Efay vs Armor King | 1–2 | 33.33% |
| Efay vs Anna | 0–2 | 0.00% |
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.