| Nielsen vs Steve | 29–23 | 55.77% |
| Nielsen vs King | 13–14 | 48.15% |
| Nielsen vs Reina | 11–14 | 44.00% |
| Nielsen vs Kazuya | 11–12 | 47.83% |
| Nielsen vs Heihachi | 7–16 | 30.43% |
| Nielsen vs Bryan | 8–12 | 40.00% |
| Nielsen vs Hwoarang | 7–10 | 41.18% |
| Nielsen vs Jin | 5–11 | 31.25% |
| Nielsen vs Law | 8–7 | 53.33% |
| Nielsen vs Lili | 6–9 | 40.00% |
| Nielsen vs Alisa | 7–8 | 46.67% |
| Nielsen vs Jun | 6–8 | 42.86% |
| Nielsen vs Fahkumram | 1–13 | 7.14% |
| Nielsen vs Victor | 5–8 | 38.46% |
| Nielsen vs Dragunov | 6–6 | 50.00% |
| Nielsen vs Yoshimitsu | 5–6 | 45.45% |
| Nielsen vs Armor King | 3–8 | 27.27% |
| Nielsen vs Miary Zo | 3–7 | 30.00% |
| Nielsen vs Devil Jin | 5–4 | 55.56% |
| Nielsen vs Kuma | 4–5 | 44.44% |
| Nielsen vs Clive | 3–5 | 37.50% |
| Nielsen vs Claudio | 2–5 | 28.57% |
| Nielsen vs Nina | 3–4 | 42.86% |
| Nielsen vs Asuka | 3–3 | 50.00% |
| Nielsen vs Lars | 1–5 | 16.67% |
| Nielsen vs Lidia | 3–3 | 50.00% |
| Nielsen vs Paul | 3–2 | 60.00% |
| Nielsen vs Jack-8 | 0–5 | 0.00% |
| Nielsen vs Feng | 1–4 | 20.00% |
| Nielsen vs Azucena | 2–3 | 40.00% |
| Nielsen vs Zafina | 2–2 | 50.00% |
| Nielsen vs Raven | 1–3 | 25.00% |
| Nielsen vs Leo | 1–2 | 33.33% |
| Nielsen vs Eddy | 0–3 | 0.00% |
| Nielsen vs Anna | 0–3 | 0.00% |
| Nielsen vs Xiaoyu | 2–0 | 100.00% |
| Nielsen vs Lee | 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.