| Ni99a vs Kazuya | 21–26 | 44.68% |
| Ni99a vs Bryan | 8–27 | 22.86% |
| Ni99a vs Jin | 7–23 | 23.33% |
| Ni99a vs King | 10–19 | 34.48% |
| Ni99a vs Steve | 10–17 | 37.04% |
| Ni99a vs Heihachi | 13–12 | 52.00% |
| Ni99a vs Hwoarang | 13–8 | 61.90% |
| Ni99a vs Law | 9–11 | 45.00% |
| Ni99a vs Devil Jin | 10–9 | 52.63% |
| Ni99a vs Fahkumram | 6–10 | 37.50% |
| Ni99a vs Paul | 4–8 | 33.33% |
| Ni99a vs Lili | 5–7 | 41.67% |
| Ni99a vs Reina | 8–2 | 80.00% |
| Ni99a vs Eddy | 4–5 | 44.44% |
| Ni99a vs Clive | 4–5 | 44.44% |
| Ni99a vs Anna | 7–2 | 77.78% |
| Ni99a vs Xiaoyu | 4–3 | 57.14% |
| Ni99a vs Jack-8 | 0–7 | 0.00% |
| Ni99a vs Feng | 0–7 | 0.00% |
| Ni99a vs Lars | 3–4 | 42.86% |
| Ni99a vs Nina | 4–2 | 66.67% |
| Ni99a vs Lee | 3–3 | 50.00% |
| Ni99a vs Asuka | 2–3 | 40.00% |
| Ni99a vs Jun | 3–2 | 60.00% |
| Ni99a vs Alisa | 2–2 | 50.00% |
| Ni99a vs Victor | 2–2 | 50.00% |
| Ni99a vs Lidia | 2–2 | 50.00% |
| Ni99a vs Dragunov | 0–3 | 0.00% |
| Ni99a vs Azucena | 3–0 | 100.00% |
| Ni99a vs Yoshimitsu | 1–1 | 50.00% |
| Ni99a vs Claudio | 0–2 | 0.00% |
| Ni99a vs Kuma | 0–2 | 0.00% |
| Ni99a vs Leroy | 0–2 | 0.00% |
| Ni99a vs Raven | 0–2 | 0.00% |
| Ni99a vs Shaheen | 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.