| Neptune vs Kazuya | 32–22 | 59.26% |
| Neptune vs King | 25–24 | 51.02% |
| Neptune vs Bryan | 24–23 | 51.06% |
| Neptune vs Jin | 29–15 | 65.91% |
| Neptune vs Hwoarang | 17–21 | 44.74% |
| Neptune vs Law | 18–19 | 48.65% |
| Neptune vs Steve | 24–13 | 64.86% |
| Neptune vs Reina | 22–13 | 62.86% |
| Neptune vs Dragunov | 13–20 | 39.39% |
| Neptune vs Eddy | 16–12 | 57.14% |
| Neptune vs Heihachi | 16–12 | 57.14% |
| Neptune vs Lili | 12–10 | 54.55% |
| Neptune vs Victor | 15–7 | 68.18% |
| Neptune vs Yoshimitsu | 9–12 | 42.86% |
| Neptune vs Lars | 17–4 | 80.95% |
| Neptune vs Asuka | 15–5 | 75.00% |
| Neptune vs Jun | 10–9 | 52.63% |
| Neptune vs Leroy | 10–6 | 62.50% |
| Neptune vs Clive | 2–14 | 12.50% |
| Neptune vs Azucena | 9–6 | 60.00% |
| Neptune vs Anna | 7–8 | 46.67% |
| Neptune vs Nina | 8–6 | 57.14% |
| Neptune vs Jack-8 | 6–7 | 46.15% |
| Neptune vs Paul | 4–8 | 33.33% |
| Neptune vs Zafina | 6–6 | 50.00% |
| Neptune vs Lidia | 9–3 | 75.00% |
| Neptune vs Alisa | 7–3 | 70.00% |
| Neptune vs Xiaoyu | 5–4 | 55.56% |
| Neptune vs Devil Jin | 1–8 | 11.11% |
| Neptune vs Leo | 6–3 | 66.67% |
| Neptune vs Claudio | 5–4 | 55.56% |
| Neptune vs Feng | 1–5 | 16.67% |
| Neptune vs Lee | 3–3 | 50.00% |
| Neptune vs Kuma | 4–2 | 66.67% |
| Neptune vs Shaheen | 2–3 | 40.00% |
| Neptune vs Panda | 3–2 | 60.00% |
| Neptune vs Raven | 4–0 | 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.