| Niiina vs Paul | 100–66 | 60.24% |
| Niiina vs Hwoarang | 72–69 | 51.06% |
| Niiina vs Dragunov | 65–75 | 46.43% |
| Niiina vs Kazuya | 65–72 | 47.45% |
| Niiina vs Bryan | 73–63 | 53.68% |
| Niiina vs King | 58–68 | 46.03% |
| Niiina vs Asuka | 77–48 | 61.60% |
| Niiina vs Reina | 57–66 | 46.34% |
| Niiina vs Jin | 62–52 | 54.39% |
| Niiina vs Lili | 50–52 | 49.02% |
| Niiina vs Law | 45–46 | 49.45% |
| Niiina vs Steve | 43–44 | 49.43% |
| Niiina vs Feng | 37–48 | 43.53% |
| Niiina vs Nina | 54–30 | 64.29% |
| Niiina vs Victor | 38–41 | 48.10% |
| Niiina vs Xiaoyu | 36–30 | 54.55% |
| Niiina vs Anna | 30–36 | 45.45% |
| Niiina vs Lars | 27–36 | 42.86% |
| Niiina vs Devil Jin | 33–28 | 54.10% |
| Niiina vs Alisa | 30–31 | 49.18% |
| Niiina vs Azucena | 25–36 | 40.98% |
| Niiina vs Yoshimitsu | 29–31 | 48.33% |
| Niiina vs Jack-8 | 23–35 | 39.66% |
| Niiina vs Claudio | 22–34 | 39.29% |
| Niiina vs Jun | 33–23 | 58.93% |
| Niiina vs Eddy | 30–24 | 55.56% |
| Niiina vs Heihachi | 24–28 | 46.15% |
| Niiina vs Shaheen | 22–29 | 43.14% |
| Niiina vs Leo | 23–27 | 46.00% |
| Niiina vs Leroy | 16–33 | 32.65% |
| Niiina vs Lee | 24–19 | 55.81% |
| Niiina vs Zafina | 10–27 | 27.03% |
| Niiina vs Clive | 16–20 | 44.44% |
| Niiina vs Kuma | 17–17 | 50.00% |
| Niiina vs Raven | 11–23 | 32.35% |
| Niiina vs Lidia | 8–20 | 28.57% |
| Niiina vs Panda | 0–7 | 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.