| Neptune king vs King | 18–20 | 47.37% |
| Neptune king vs Jin | 11–17 | 39.29% |
| Neptune king vs Reina | 17–11 | 60.71% |
| Neptune king vs Heihachi | 11–10 | 52.38% |
| Neptune king vs Hwoarang | 12–8 | 60.00% |
| Neptune king vs Jun | 10–10 | 50.00% |
| Neptune king vs Kazuya | 11–6 | 64.71% |
| Neptune king vs Steve | 7–9 | 43.75% |
| Neptune king vs Victor | 10–5 | 66.67% |
| Neptune king vs Lee | 6–8 | 42.86% |
| Neptune king vs Claudio | 6–7 | 46.15% |
| Neptune king vs Law | 5–6 | 45.45% |
| Neptune king vs Eddy | 9–2 | 81.82% |
| Neptune king vs Azucena | 7–3 | 70.00% |
| Neptune king vs Bryan | 4–5 | 44.44% |
| Neptune king vs Asuka | 3–6 | 33.33% |
| Neptune king vs Lili | 4–4 | 50.00% |
| Neptune king vs Lidia | 4–3 | 57.14% |
| Neptune king vs Dragunov | 1–5 | 16.67% |
| Neptune king vs Raven | 4–2 | 66.67% |
| Neptune king vs Yoshimitsu | 2–3 | 40.00% |
| Neptune king vs Xiaoyu | 3–2 | 60.00% |
| Neptune king vs Devil Jin | 3–2 | 60.00% |
| Neptune king vs Alisa | 0–5 | 0.00% |
| Neptune king vs Nina | 1–4 | 20.00% |
| Neptune king vs Zafina | 4–1 | 80.00% |
| Neptune king vs Paul | 1–3 | 25.00% |
| Neptune king vs Feng | 2–2 | 50.00% |
| Neptune king vs Leo | 2–2 | 50.00% |
| Neptune king vs Lars | 2–2 | 50.00% |
| Neptune king vs Kuma | 2–2 | 50.00% |
| Neptune king vs Armor King | 2–2 | 50.00% |
| Neptune king vs Jack-8 | 2–1 | 66.67% |
| Neptune king vs Shaheen | 1–2 | 33.33% |
| Neptune king vs Leroy | 2–1 | 66.67% |
| Neptune king vs Fahkumram | 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.