| The_Underfaker vs King | 22–23 | 48.89% |
| The_Underfaker vs Reina | 12–17 | 41.38% |
| The_Underfaker vs Jin | 5–22 | 18.52% |
| The_Underfaker vs Steve | 12–15 | 44.44% |
| The_Underfaker vs Bryan | 13–12 | 52.00% |
| The_Underfaker vs Kazuya | 8–14 | 36.36% |
| The_Underfaker vs Heihachi | 13–8 | 61.90% |
| The_Underfaker vs Yoshimitsu | 10–9 | 52.63% |
| The_Underfaker vs Hwoarang | 5–14 | 26.32% |
| The_Underfaker vs Lili | 11–7 | 61.11% |
| The_Underfaker vs Clive | 6–11 | 35.29% |
| The_Underfaker vs Victor | 9–7 | 56.25% |
| The_Underfaker vs Anna | 7–9 | 43.75% |
| The_Underfaker vs Miary Zo | 9–7 | 56.25% |
| The_Underfaker vs Dragunov | 4–11 | 26.67% |
| The_Underfaker vs Lars | 6–9 | 40.00% |
| The_Underfaker vs Law | 4–10 | 28.57% |
| The_Underfaker vs Xiaoyu | 10–4 | 71.43% |
| The_Underfaker vs Azucena | 10–4 | 71.43% |
| The_Underfaker vs Asuka | 9–4 | 69.23% |
| The_Underfaker vs Nina | 5–7 | 41.67% |
| The_Underfaker vs Paul | 5–6 | 45.45% |
| The_Underfaker vs Leo | 1–10 | 9.09% |
| The_Underfaker vs Devil Jin | 1–9 | 10.00% |
| The_Underfaker vs Leroy | 6–4 | 60.00% |
| The_Underfaker vs Raven | 5–5 | 50.00% |
| The_Underfaker vs Fahkumram | 6–4 | 60.00% |
| The_Underfaker vs Armor King | 7–3 | 70.00% |
| The_Underfaker vs Eddy | 4–5 | 44.44% |
| The_Underfaker vs Lidia | 2–7 | 22.22% |
| The_Underfaker vs Alisa | 2–5 | 28.57% |
| The_Underfaker vs Lee | 1–6 | 14.29% |
| The_Underfaker vs Jack-8 | 1–5 | 16.67% |
| The_Underfaker vs Jun | 3–2 | 60.00% |
| The_Underfaker vs Claudio | 1–3 | 25.00% |
| The_Underfaker vs Kuma | 1–2 | 33.33% |
| The_Underfaker vs Feng | 0–2 | 0.00% |
| The_Underfaker vs Panda | 2–0 | 100.00% |
| The_Underfaker vs Zafina | 0–2 | 0.00% |
| The_Underfaker vs Shaheen | 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.