| Niku vs Reina | 76–103 | 42.46% |
| Niku vs Jin | 57–108 | 34.55% |
| Niku vs Kazuya | 53–110 | 32.52% |
| Niku vs Dragunov | 50–98 | 33.78% |
| Niku vs Steve | 46–66 | 41.07% |
| Niku vs King | 36–74 | 32.73% |
| Niku vs Lili | 42–62 | 40.38% |
| Niku vs Jun | 24–72 | 25.00% |
| Niku vs Lidia | 32–59 | 35.16% |
| Niku vs Hwoarang | 31–56 | 35.63% |
| Niku vs Heihachi | 28–57 | 32.94% |
| Niku vs Victor | 25–58 | 30.12% |
| Niku vs Clive | 30–50 | 37.50% |
| Niku vs Yoshimitsu | 31–37 | 45.59% |
| Niku vs Asuka | 19–48 | 28.36% |
| Niku vs Law | 25–37 | 40.32% |
| Niku vs Bryan | 21–39 | 35.00% |
| Niku vs Xiaoyu | 28–20 | 58.33% |
| Niku vs Paul | 20–27 | 42.55% |
| Niku vs Lars | 16–31 | 34.04% |
| Niku vs Devil Jin | 14–32 | 30.43% |
| Niku vs Claudio | 14–30 | 31.82% |
| Niku vs Lee | 20–23 | 46.51% |
| Niku vs Azucena | 17–26 | 39.53% |
| Niku vs Leroy | 19–20 | 48.72% |
| Niku vs Feng | 12–26 | 31.58% |
| Niku vs Alisa | 13–25 | 34.21% |
| Niku vs Shaheen | 13–21 | 38.24% |
| Niku vs Nina | 11–18 | 37.93% |
| Niku vs Leo | 15–13 | 53.57% |
| Niku vs Eddy | 13–14 | 48.15% |
| Niku vs Kuma | 3–13 | 18.75% |
| Niku vs Jack-8 | 5–8 | 38.46% |
| Niku vs Raven | 5–5 | 50.00% |
| Niku vs Panda | 4–4 | 50.00% |
| Niku vs Zafina | 6–0 | 100.00% |
| Niku vs Anna | 4–1 | 80.00% |
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.