| Niklaus vs Jin | 20–34 | 37.04% |
| Niklaus vs King | 14–31 | 31.11% |
| Niklaus vs Steve | 18–21 | 46.15% |
| Niklaus vs Eddy | 19–20 | 48.72% |
| Niklaus vs Lili | 16–16 | 50.00% |
| Niklaus vs Kazuya | 17–13 | 56.67% |
| Niklaus vs Bryan | 6–18 | 25.00% |
| Niklaus vs Reina | 15–7 | 68.18% |
| Niklaus vs Law | 10–11 | 47.62% |
| Niklaus vs Xiaoyu | 3–17 | 15.00% |
| Niklaus vs Devil Jin | 6–12 | 33.33% |
| Niklaus vs Dragunov | 7–11 | 38.89% |
| Niklaus vs Hwoarang | 10–7 | 58.82% |
| Niklaus vs Victor | 7–10 | 41.18% |
| Niklaus vs Anna | 5–7 | 41.67% |
| Niklaus vs Heihachi | 8–3 | 72.73% |
| Niklaus vs Paul | 2–8 | 20.00% |
| Niklaus vs Feng | 6–4 | 60.00% |
| Niklaus vs Zafina | 6–4 | 60.00% |
| Niklaus vs Lars | 5–3 | 62.50% |
| Niklaus vs Clive | 5–2 | 71.43% |
| Niklaus vs Nina | 1–5 | 16.67% |
| Niklaus vs Azucena | 4–2 | 66.67% |
| Niklaus vs Claudio | 1–4 | 20.00% |
| Niklaus vs Raven | 1–4 | 20.00% |
| Niklaus vs Shaheen | 2–2 | 50.00% |
| Niklaus vs Leroy | 3–1 | 75.00% |
| Niklaus vs Jun | 2–2 | 50.00% |
| Niklaus vs Yoshimitsu | 2–1 | 66.67% |
| Niklaus vs Asuka | 2–1 | 66.67% |
| Niklaus vs Lee | 1–2 | 33.33% |
| Niklaus vs Jack-8 | 0–2 | 0.00% |
| Niklaus vs Leo | 0–2 | 0.00% |
| Niklaus vs Lidia | 1–1 | 50.00% |
| Niklaus vs Alisa | 1–0 | 100.00% |
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.