| Underdem vs King | 34–31 | 52.31% |
| Underdem vs Jin | 25–31 | 44.64% |
| Underdem vs Kazuya | 24–31 | 43.64% |
| Underdem vs Reina | 35–20 | 63.64% |
| Underdem vs Bryan | 16–19 | 45.71% |
| Underdem vs Steve | 19–15 | 55.88% |
| Underdem vs Hwoarang | 18–12 | 60.00% |
| Underdem vs Nina | 18–9 | 66.67% |
| Underdem vs Eddy | 14–13 | 51.85% |
| Underdem vs Yoshimitsu | 10–15 | 40.00% |
| Underdem vs Paul | 14–10 | 58.33% |
| Underdem vs Lili | 8–16 | 33.33% |
| Underdem vs Law | 9–14 | 39.13% |
| Underdem vs Lars | 11–9 | 55.00% |
| Underdem vs Leroy | 8–10 | 44.44% |
| Underdem vs Devil Jin | 10–7 | 58.82% |
| Underdem vs Feng | 7–10 | 41.18% |
| Underdem vs Azucena | 12–5 | 70.59% |
| Underdem vs Asuka | 10–6 | 62.50% |
| Underdem vs Jack-8 | 9–6 | 60.00% |
| Underdem vs Dragunov | 7–7 | 50.00% |
| Underdem vs Alisa | 4–9 | 30.77% |
| Underdem vs Xiaoyu | 3–8 | 27.27% |
| Underdem vs Jun | 6–5 | 54.55% |
| Underdem vs Victor | 4–7 | 36.36% |
| Underdem vs Raven | 4–6 | 40.00% |
| Underdem vs Lee | 5–4 | 55.56% |
| Underdem vs Lidia | 6–3 | 66.67% |
| Underdem vs Leo | 3–5 | 37.50% |
| Underdem vs Claudio | 2–6 | 25.00% |
| Underdem vs Panda | 1–6 | 14.29% |
| Underdem vs Shaheen | 2–4 | 33.33% |
| Underdem vs Fahkumram | 2–4 | 33.33% |
| Underdem vs Zafina | 4–1 | 80.00% |
| Underdem vs Miary Zo | 3–2 | 60.00% |
| Underdem vs Kuma | 2–2 | 50.00% |
| Underdem vs Heihachi | 1–1 | 50.00% |
| Underdem vs Clive | 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.