| NIGHTMARE vs Clive | 40–41 | 49.38% |
| NIGHTMARE vs Kazuya | 47–26 | 64.38% |
| NIGHTMARE vs King | 40–29 | 57.97% |
| NIGHTMARE vs Reina | 36–30 | 54.55% |
| NIGHTMARE vs Jin | 33–20 | 62.26% |
| NIGHTMARE vs Bryan | 31–20 | 60.78% |
| NIGHTMARE vs Steve | 30–21 | 58.82% |
| NIGHTMARE vs Hwoarang | 26–21 | 55.32% |
| NIGHTMARE vs Azucena | 28–17 | 62.22% |
| NIGHTMARE vs Dragunov | 15–28 | 34.88% |
| NIGHTMARE vs Lee | 17–25 | 40.48% |
| NIGHTMARE vs Yoshimitsu | 20–17 | 54.05% |
| NIGHTMARE vs Law | 24–12 | 66.67% |
| NIGHTMARE vs Eddy | 19–17 | 52.78% |
| NIGHTMARE vs Lili | 19–14 | 57.58% |
| NIGHTMARE vs Paul | 22–10 | 68.75% |
| NIGHTMARE vs Jun | 18–14 | 56.25% |
| NIGHTMARE vs Asuka | 16–15 | 51.61% |
| NIGHTMARE vs Nina | 14–16 | 46.67% |
| NIGHTMARE vs Heihachi | 17–10 | 62.96% |
| NIGHTMARE vs Jack-8 | 13–11 | 54.17% |
| NIGHTMARE vs Devil Jin | 11–10 | 52.38% |
| NIGHTMARE vs Claudio | 11–10 | 52.38% |
| NIGHTMARE vs Alisa | 12–8 | 60.00% |
| NIGHTMARE vs Victor | 13–6 | 68.42% |
| NIGHTMARE vs Lars | 10–8 | 55.56% |
| NIGHTMARE vs Xiaoyu | 8–9 | 47.06% |
| NIGHTMARE vs Kuma | 6–11 | 35.29% |
| NIGHTMARE vs Feng | 9–7 | 56.25% |
| NIGHTMARE vs Raven | 11–5 | 68.75% |
| NIGHTMARE vs Leo | 4–6 | 40.00% |
| NIGHTMARE vs Lidia | 1–7 | 12.50% |
| NIGHTMARE vs Leroy | 2–5 | 28.57% |
| NIGHTMARE vs Shaheen | 5–1 | 83.33% |
| NIGHTMARE vs Panda | 3–1 | 75.00% |
| NIGHTMARE vs Zafina | 1–2 | 33.33% |
| NIGHTMARE vs Anna | 0–3 | 0.00% |
| NIGHTMARE vs Fahkumram | 2–1 | 66.67% |
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.