| JustKnow15 vs Jin | 94–123 | 43.32% |
| JustKnow15 vs King | 90–91 | 49.72% |
| JustKnow15 vs Bryan | 61–105 | 36.75% |
| JustKnow15 vs Kazuya | 65–94 | 40.88% |
| JustKnow15 vs Dragunov | 61–92 | 39.87% |
| JustKnow15 vs Steve | 75–74 | 50.34% |
| JustKnow15 vs Hwoarang | 41–84 | 32.80% |
| JustKnow15 vs Law | 45–55 | 45.00% |
| JustKnow15 vs Azucena | 43–50 | 46.24% |
| JustKnow15 vs Victor | 46–46 | 50.00% |
| JustKnow15 vs Yoshimitsu | 41–46 | 47.13% |
| JustKnow15 vs Lili | 40–41 | 49.38% |
| JustKnow15 vs Heihachi | 33–46 | 41.77% |
| JustKnow15 vs Paul | 32–41 | 43.84% |
| JustKnow15 vs Reina | 39–29 | 57.35% |
| JustKnow15 vs Devil Jin | 22–45 | 32.84% |
| JustKnow15 vs Lars | 23–43 | 34.85% |
| JustKnow15 vs Alisa | 21–43 | 32.81% |
| JustKnow15 vs Fahkumram | 27–36 | 42.86% |
| JustKnow15 vs Jun | 28–28 | 50.00% |
| JustKnow15 vs Lee | 26–28 | 48.15% |
| JustKnow15 vs Asuka | 24–29 | 45.28% |
| JustKnow15 vs Feng | 12–37 | 24.49% |
| JustKnow15 vs Clive | 18–28 | 39.13% |
| JustKnow15 vs Armor King | 18–28 | 39.13% |
| JustKnow15 vs Shaheen | 17–25 | 40.48% |
| JustKnow15 vs Eddy | 15–27 | 35.71% |
| JustKnow15 vs Kuma | 13–24 | 35.14% |
| JustKnow15 vs Nina | 18–18 | 50.00% |
| JustKnow15 vs Anna | 16–19 | 45.71% |
| JustKnow15 vs Xiaoyu | 9–25 | 26.47% |
| JustKnow15 vs Raven | 12–14 | 46.15% |
| JustKnow15 vs Leroy | 13–11 | 54.17% |
| JustKnow15 vs Jack-8 | 9–12 | 42.86% |
| JustKnow15 vs Panda | 7–13 | 35.00% |
| JustKnow15 vs Claudio | 5–14 | 26.32% |
| JustKnow15 vs Lidia | 5–12 | 29.41% |
| JustKnow15 vs Leo | 3–12 | 20.00% |
| JustKnow15 vs Miary Zo | 4–9 | 30.77% |
| JustKnow15 vs Zafina | 4–7 | 36.36% |
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.