| Nappa vs Fahkumram | 15–2 | 88.24% |
| Nappa vs Steve | 7–9 | 43.75% |
| Nappa vs Hwoarang | 9–4 | 69.23% |
| Nappa vs Kazuya | 5–7 | 41.67% |
| Nappa vs Jin | 9–2 | 81.82% |
| Nappa vs Eddy | 2–9 | 18.18% |
| Nappa vs Azucena | 6–4 | 60.00% |
| Nappa vs Lili | 8–1 | 88.89% |
| Nappa vs Reina | 6–3 | 66.67% |
| Nappa vs King | 1–7 | 12.50% |
| Nappa vs Bryan | 6–1 | 85.71% |
| Nappa vs Paul | 4–2 | 66.67% |
| Nappa vs Zafina | 4–2 | 66.67% |
| Nappa vs Law | 2–3 | 40.00% |
| Nappa vs Yoshimitsu | 2–2 | 50.00% |
| Nappa vs Asuka | 2–2 | 50.00% |
| Nappa vs Alisa | 2–2 | 50.00% |
| Nappa vs Devil Jin | 2–1 | 66.67% |
| Nappa vs Lars | 2–1 | 66.67% |
| Nappa vs Shaheen | 1–2 | 33.33% |
| Nappa vs Nina | 2–1 | 66.67% |
| Nappa vs Lee | 0–3 | 0.00% |
| Nappa vs Kuma | 1–2 | 33.33% |
| Nappa vs Panda | 1–2 | 33.33% |
| Nappa vs Victor | 0–3 | 0.00% |
| Nappa vs Lidia | 0–3 | 0.00% |
| Nappa vs Anna | 1–2 | 33.33% |
| Nappa vs Xiaoyu | 2–0 | 100.00% |
| Nappa vs Feng | 0–2 | 0.00% |
| Nappa vs Leo | 0–2 | 0.00% |
| Nappa vs Raven | 1–1 | 50.00% |
| Nappa vs Clive | 0–2 | 0.00% |
| Nappa vs Dragunov | 0–1 | 0.00% |
| Nappa vs Claudio | 0–1 | 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.