| Níðhöggr vs Lili | 22–7 | 75.86% |
| Níðhöggr vs Reina | 9–14 | 39.13% |
| Níðhöggr vs Bryan | 10–11 | 47.62% |
| Níðhöggr vs Kazuya | 11–9 | 55.00% |
| Níðhöggr vs Alisa | 7–12 | 36.84% |
| Níðhöggr vs Jin | 10–7 | 58.82% |
| Níðhöggr vs Steve | 10–7 | 58.82% |
| Níðhöggr vs Victor | 6–11 | 35.29% |
| Níðhöggr vs Hwoarang | 7–9 | 43.75% |
| Níðhöggr vs King | 6–9 | 40.00% |
| Níðhöggr vs Law | 4–10 | 28.57% |
| Níðhöggr vs Feng | 9–5 | 64.29% |
| Níðhöggr vs Dragunov | 5–8 | 38.46% |
| Níðhöggr vs Devil Jin | 4–8 | 33.33% |
| Níðhöggr vs Lidia | 6–5 | 54.55% |
| Níðhöggr vs Yoshimitsu | 7–3 | 70.00% |
| Níðhöggr vs Lars | 3–7 | 30.00% |
| Níðhöggr vs Lee | 9–0 | 100.00% |
| Níðhöggr vs Eddy | 7–2 | 77.78% |
| Níðhöggr vs Asuka | 3–5 | 37.50% |
| Níðhöggr vs Xiaoyu | 2–4 | 33.33% |
| Níðhöggr vs Jack-8 | 2–3 | 40.00% |
| Níðhöggr vs Shaheen | 4–1 | 80.00% |
| Níðhöggr vs Leroy | 1–4 | 20.00% |
| Níðhöggr vs Claudio | 0–4 | 0.00% |
| Níðhöggr vs Azucena | 4–0 | 100.00% |
| Níðhöggr vs Leo | 1–2 | 33.33% |
| Níðhöggr vs Zafina | 2–1 | 66.67% |
| Níðhöggr vs Jun | 1–2 | 33.33% |
| Níðhöggr vs Paul | 0–2 | 0.00% |
| Níðhöggr vs Raven | 0–2 | 0.00% |
| Níðhöggr vs Panda | 0–1 | 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.