| Niire vs Heihachi | 14–6 | 70.00% |
| Niire vs Steve | 11–4 | 73.33% |
| Niire vs Law | 10–4 | 71.43% |
| Niire vs Dragunov | 7–2 | 77.78% |
| Niire vs Azucena | 8–1 | 88.89% |
| Niire vs Eddy | 5–4 | 55.56% |
| Niire vs Lidia | 8–1 | 88.89% |
| Niire vs King | 8–0 | 100.00% |
| Niire vs Bryan | 6–2 | 75.00% |
| Niire vs Kazuya | 3–5 | 37.50% |
| Niire vs Victor | 5–2 | 71.43% |
| Niire vs Devil Jin | 1–4 | 20.00% |
| Niire vs Reina | 4–1 | 80.00% |
| Niire vs Leo | 2–2 | 50.00% |
| Niire vs Kuma | 4–0 | 100.00% |
| Niire vs Xiaoyu | 2–1 | 66.67% |
| Niire vs Feng | 2–1 | 66.67% |
| Niire vs Alisa | 2–1 | 66.67% |
| Niire vs Lee | 1–2 | 33.33% |
| Niire vs Zafina | 2–1 | 66.67% |
| Niire vs Yoshimitsu | 2–0 | 100.00% |
| Niire vs Hwoarang | 2–0 | 100.00% |
| Niire vs Lili | 1–1 | 50.00% |
| Niire vs Paul | 0–1 | 0.00% |
| Niire vs Jin | 1–0 | 100.00% |
| Niire vs Jack-8 | 0–1 | 0.00% |
| Niire vs Jun | 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.