| Worse nightmare vs King | 10–6 | 62.50% |
| Worse nightmare vs Jun | 7–9 | 43.75% |
| Worse nightmare vs Reina | 7–5 | 58.33% |
| Worse nightmare vs Steve | 3–8 | 27.27% |
| Worse nightmare vs Fahkumram | 7–3 | 70.00% |
| Worse nightmare vs Bryan | 5–4 | 55.56% |
| Worse nightmare vs Kazuya | 5–3 | 62.50% |
| Worse nightmare vs Lars | 6–2 | 75.00% |
| Worse nightmare vs Clive | 3–5 | 37.50% |
| Worse nightmare vs Lili | 1–6 | 14.29% |
| Worse nightmare vs Hwoarang | 5–1 | 83.33% |
| Worse nightmare vs Alisa | 3–3 | 50.00% |
| Worse nightmare vs Azucena | 1–5 | 16.67% |
| Worse nightmare vs Yoshimitsu | 1–4 | 20.00% |
| Worse nightmare vs Jack-8 | 3–2 | 60.00% |
| Worse nightmare vs Anna | 4–1 | 80.00% |
| Worse nightmare vs Law | 2–2 | 50.00% |
| Worse nightmare vs Dragunov | 2–2 | 50.00% |
| Worse nightmare vs Asuka | 1–2 | 33.33% |
| Worse nightmare vs Lidia | 2–1 | 66.67% |
| Worse nightmare vs Jin | 2–0 | 100.00% |
| Worse nightmare vs Claudio | 0–2 | 0.00% |
| Worse nightmare vs Lee | 2–0 | 100.00% |
| Worse nightmare vs Kuma | 2–0 | 100.00% |
| Worse nightmare vs Victor | 2–0 | 100.00% |
| Worse nightmare vs Armor King | 1–1 | 50.00% |
| Worse nightmare vs Leo | 0–1 | 0.00% |
| Worse nightmare vs Nina | 1–0 | 100.00% |
| Worse nightmare vs Zafina | 1–0 | 100.00% |
| Worse nightmare vs Leroy | 1–0 | 100.00% |
| Worse nightmare vs Eddy | 0–1 | 0.00% |
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.