| Nìðhöggr vs Reina | 18–12 | 60.00% |
| Nìðhöggr vs King | 5–15 | 25.00% |
| Nìðhöggr vs Steve | 8–12 | 40.00% |
| Nìðhöggr vs Dragunov | 4–16 | 20.00% |
| Nìðhöggr vs Law | 9–10 | 47.37% |
| Nìðhöggr vs Kazuya | 4–13 | 23.53% |
| Nìðhöggr vs Azucena | 10–7 | 58.82% |
| Nìðhöggr vs Bryan | 6–10 | 37.50% |
| Nìðhöggr vs Hwoarang | 9–6 | 60.00% |
| Nìðhöggr vs Nina | 7–7 | 50.00% |
| Nìðhöggr vs Jun | 8–6 | 57.14% |
| Nìðhöggr vs Paul | 9–4 | 69.23% |
| Nìðhöggr vs Jin | 8–5 | 61.54% |
| Nìðhöggr vs Lili | 3–9 | 25.00% |
| Nìðhöggr vs Victor | 5–7 | 41.67% |
| Nìðhöggr vs Eddy | 7–5 | 58.33% |
| Nìðhöggr vs Anna | 6–6 | 50.00% |
| Nìðhöggr vs Feng | 5–6 | 45.45% |
| Nìðhöggr vs Lars | 4–7 | 36.36% |
| Nìðhöggr vs Lee | 6–5 | 54.55% |
| Nìðhöggr vs Claudio | 3–7 | 30.00% |
| Nìðhöggr vs Heihachi | 3–7 | 30.00% |
| Nìðhöggr vs Xiaoyu | 6–3 | 66.67% |
| Nìðhöggr vs Leo | 4–5 | 44.44% |
| Nìðhöggr vs Lidia | 7–2 | 77.78% |
| Nìðhöggr vs Jack-8 | 3–5 | 37.50% |
| Nìðhöggr vs Alisa | 4–4 | 50.00% |
| Nìðhöggr vs Leroy | 0–8 | 0.00% |
| Nìðhöggr vs Raven | 2–6 | 25.00% |
| Nìðhöggr vs Yoshimitsu | 3–3 | 50.00% |
| Nìðhöggr vs Devil Jin | 2–4 | 33.33% |
| Nìðhöggr vs Clive | 1–4 | 20.00% |
| Nìðhöggr vs Asuka | 2–1 | 66.67% |
| Nìðhöggr vs Shaheen | 2–0 | 100.00% |
| Nìðhöggr vs Panda | 2–0 | 100.00% |
| Nìðhöggr vs Zafina | 1–1 | 50.00% |
| Nìðhöggr vs Fahkumram | 2–0 | 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.