| Niiisaan vs Eddy | 5–8 | 38.46% |
| Niiisaan vs King | 7–4 | 63.64% |
| Niiisaan vs Reina | 8–3 | 72.73% |
| Niiisaan vs Law | 5–5 | 50.00% |
| Niiisaan vs Feng | 3–6 | 33.33% |
| Niiisaan vs Jin | 4–3 | 57.14% |
| Niiisaan vs Dragunov | 4–3 | 57.14% |
| Niiisaan vs Hwoarang | 3–2 | 60.00% |
| Niiisaan vs Steve | 1–4 | 20.00% |
| Niiisaan vs Lee | 4–1 | 80.00% |
| Niiisaan vs Paul | 0–4 | 0.00% |
| Niiisaan vs Xiaoyu | 2–2 | 50.00% |
| Niiisaan vs Kazuya | 1–3 | 25.00% |
| Niiisaan vs Alisa | 0–4 | 0.00% |
| Niiisaan vs Kuma | 0–4 | 0.00% |
| Niiisaan vs Azucena | 1–3 | 25.00% |
| Niiisaan vs Lidia | 2–2 | 50.00% |
| Niiisaan vs Yoshimitsu | 3–0 | 100.00% |
| Niiisaan vs Devil Jin | 1–2 | 33.33% |
| Niiisaan vs Jun | 3–0 | 100.00% |
| Niiisaan vs Raven | 1–2 | 33.33% |
| Niiisaan vs Claudio | 0–2 | 0.00% |
| Niiisaan vs Zafina | 2–0 | 100.00% |
| Niiisaan vs Bryan | 1–0 | 100.00% |
| Niiisaan vs Lars | 0–1 | 0.00% |
| Niiisaan vs Victor | 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.