| Neptune vs Kazuya | 34–36 | 48.57% |
| Neptune vs King | 36–23 | 61.02% |
| Neptune vs Reina | 19–24 | 44.19% |
| Neptune vs Bryan | 23–15 | 60.53% |
| Neptune vs Steve | 25–13 | 65.79% |
| Neptune vs Hwoarang | 25–12 | 67.57% |
| Neptune vs Jin | 24–9 | 72.73% |
| Neptune vs Dragunov | 15–17 | 46.88% |
| Neptune vs Nina | 14–15 | 48.28% |
| Neptune vs Lidia | 15–12 | 55.56% |
| Neptune vs Eddy | 16–10 | 61.54% |
| Neptune vs Law | 17–8 | 68.00% |
| Neptune vs Paul | 8–16 | 33.33% |
| Neptune vs Xiaoyu | 15–8 | 65.22% |
| Neptune vs Asuka | 13–10 | 56.52% |
| Neptune vs Alisa | 15–8 | 65.22% |
| Neptune vs Lee | 10–13 | 43.48% |
| Neptune vs Lili | 12–10 | 54.55% |
| Neptune vs Feng | 8–11 | 42.11% |
| Neptune vs Lars | 7–12 | 36.84% |
| Neptune vs Jun | 9–9 | 50.00% |
| Neptune vs Leroy | 9–8 | 52.94% |
| Neptune vs Victor | 11–6 | 64.71% |
| Neptune vs Yoshimitsu | 11–5 | 68.75% |
| Neptune vs Heihachi | 14–2 | 87.50% |
| Neptune vs Leo | 7–7 | 50.00% |
| Neptune vs Devil Jin | 5–7 | 41.67% |
| Neptune vs Armor King | 6–6 | 50.00% |
| Neptune vs Claudio | 9–2 | 81.82% |
| Neptune vs Fahkumram | 7–4 | 63.64% |
| Neptune vs Raven | 6–4 | 60.00% |
| Neptune vs Anna | 6–4 | 60.00% |
| Neptune vs Azucena | 6–3 | 66.67% |
| Neptune vs Shaheen | 4–4 | 50.00% |
| Neptune vs Kuma | 6–2 | 75.00% |
| Neptune vs Zafina | 4–2 | 66.67% |
| Neptune vs Clive | 4–1 | 80.00% |
| Neptune vs Miary Zo | 0–3 | 0.00% |
| Neptune vs Jack-8 | 2–0 | 100.00% |
| Neptune vs Panda | 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.