| Sam_Masamune vs Kazuya | 380–380–1 | 50.00% |
| Sam_Masamune vs Jin | 282–302–1 | 48.29% |
| Sam_Masamune vs King | 260–314 | 45.30% |
| Sam_Masamune vs Bryan | 272–300 | 47.55% |
| Sam_Masamune vs Reina | 273–272 | 50.09% |
| Sam_Masamune vs Law | 234–238 | 49.58% |
| Sam_Masamune vs Heihachi | 212–242 | 46.70% |
| Sam_Masamune vs Lidia | 202–251 | 44.59% |
| Sam_Masamune vs Hwoarang | 215–219 | 49.54% |
| Sam_Masamune vs Steve | 199–220 | 47.49% |
| Sam_Masamune vs Paul | 198–187 | 51.43% |
| Sam_Masamune vs Lili | 151–210 | 41.83% |
| Sam_Masamune vs Lee | 155–201 | 43.54% |
| Sam_Masamune vs Dragunov | 137–207 | 39.83% |
| Sam_Masamune vs Yoshimitsu | 170–153 | 52.63% |
| Sam_Masamune vs Devil Jin | 128–185 | 40.89% |
| Sam_Masamune vs Jun | 183–119 | 60.60% |
| Sam_Masamune vs Azucena | 146–141 | 50.87% |
| Sam_Masamune vs Asuka | 137–140 | 49.46% |
| Sam_Masamune vs Eddy | 150–116 | 56.39% |
| Sam_Masamune vs Xiaoyu | 127–130 | 49.42% |
| Sam_Masamune vs Clive | 115–117 | 49.57% |
| Sam_Masamune vs Lars | 92–135 | 40.53% |
| Sam_Masamune vs Nina | 95–111 | 46.12% |
| Sam_Masamune vs Victor | 91–114 | 44.39% |
| Sam_Masamune vs Feng | 91–107 | 45.96% |
| Sam_Masamune vs Leo | 86–111 | 43.65% |
| Sam_Masamune vs Jack-8 | 88–86 | 50.57% |
| Sam_Masamune vs Leroy | 76–95 | 44.44% |
| Sam_Masamune vs Claudio | 76–82 | 48.10% |
| Sam_Masamune vs Alisa | 65–91 | 41.67% |
| Sam_Masamune vs Raven | 63–93 | 40.38% |
| Sam_Masamune vs Fahkumram | 56–85 | 39.72% |
| Sam_Masamune vs Armor King | 55–62 | 47.01% |
| Sam_Masamune vs Miary Zo | 44–55 | 44.44% |
| Sam_Masamune vs Kuma | 55–38 | 59.14% |
| Sam_Masamune vs Zafina | 38–53 | 41.76% |
| Sam_Masamune vs Shaheen | 29–60 | 32.58% |
| Sam_Masamune vs Panda | 26–23 | 53.06% |
| Sam_Masamune vs Anna | 22–21 | 51.16% |
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.