| Nappa vs Jin | 14–13 | 51.85% |
| Nappa vs King | 11–9 | 55.00% |
| Nappa vs Steve | 8–12 | 40.00% |
| Nappa vs Kazuya | 9–10 | 47.37% |
| Nappa vs Reina | 16–1 | 94.12% |
| Nappa vs Hwoarang | 5–10 | 33.33% |
| Nappa vs Lili | 7–6 | 53.85% |
| Nappa vs Nina | 6–7 | 46.15% |
| Nappa vs Anna | 5–8 | 38.46% |
| Nappa vs Xiaoyu | 4–8 | 33.33% |
| Nappa vs Dragunov | 4–7 | 36.36% |
| Nappa vs Lars | 5–5 | 50.00% |
| Nappa vs Heihachi | 4–6 | 40.00% |
| Nappa vs Bryan | 3–6 | 33.33% |
| Nappa vs Eddy | 6–3 | 66.67% |
| Nappa vs Law | 4–4 | 50.00% |
| Nappa vs Azucena | 5–3 | 62.50% |
| Nappa vs Yoshimitsu | 3–4 | 42.86% |
| Nappa vs Asuka | 3–4 | 42.86% |
| Nappa vs Jun | 1–6 | 14.29% |
| Nappa vs Lidia | 3–3 | 50.00% |
| Nappa vs Shaheen | 4–1 | 80.00% |
| Nappa vs Clive | 3–2 | 60.00% |
| Nappa vs Leo | 1–3 | 25.00% |
| Nappa vs Kuma | 1–3 | 25.00% |
| Nappa vs Devil Jin | 2–1 | 66.67% |
| Nappa vs Claudio | 2–1 | 66.67% |
| Nappa vs Panda | 1–2 | 33.33% |
| Nappa vs Victor | 2–1 | 66.67% |
| Nappa vs Paul | 2–0 | 100.00% |
| Nappa vs Jack-8 | 0–2 | 0.00% |
| Nappa vs Zafina | 2–0 | 100.00% |
| Nappa vs Leroy | 2–0 | 100.00% |
| Nappa vs Alisa | 1–0 | 100.00% |
| Nappa vs Raven | 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.