| Sefster vs Steve | 21–30 | 41.18% |
| Sefster vs King | 10–22 | 31.25% |
| Sefster vs Bryan | 9–20 | 31.03% |
| Sefster vs Asuka | 13–13 | 50.00% |
| Sefster vs Lars | 10–14 | 41.67% |
| Sefster vs Victor | 8–16 | 33.33% |
| Sefster vs Armor King | 5–17 | 22.73% |
| Sefster vs Hwoarang | 5–16 | 23.81% |
| Sefster vs Kazuya | 8–12 | 40.00% |
| Sefster vs Dragunov | 4–13 | 23.53% |
| Sefster vs Heihachi | 5–12 | 29.41% |
| Sefster vs Law | 8–8 | 50.00% |
| Sefster vs Jun | 9–7 | 56.25% |
| Sefster vs Azucena | 4–11 | 26.67% |
| Sefster vs Eddy | 6–8 | 42.86% |
| Sefster vs Jin | 5–8 | 38.46% |
| Sefster vs Claudio | 3–10 | 23.08% |
| Sefster vs Clive | 3–10 | 23.08% |
| Sefster vs Fahkumram | 5–7 | 41.67% |
| Sefster vs Reina | 5–6 | 45.45% |
| Sefster vs Miary Zo | 4–7 | 36.36% |
| Sefster vs Xiaoyu | 4–6 | 40.00% |
| Sefster vs Nina | 7–3 | 70.00% |
| Sefster vs Paul | 5–3 | 62.50% |
| Sefster vs Lili | 2–6 | 25.00% |
| Sefster vs Leo | 5–3 | 62.50% |
| Sefster vs Zafina | 4–4 | 50.00% |
| Sefster vs Shaheen | 1–6 | 14.29% |
| Sefster vs Leroy | 1–6 | 14.29% |
| Sefster vs Raven | 2–5 | 28.57% |
| Sefster vs Lidia | 5–1 | 83.33% |
| Sefster vs Jack-8 | 1–3 | 25.00% |
| Sefster vs Alisa | 0–3 | 0.00% |
| Sefster vs Anna | 0–3 | 0.00% |
| Sefster vs Yoshimitsu | 0–2 | 0.00% |
| Sefster vs Devil Jin | 2–0 | 100.00% |
| Sefster vs Feng | 0–2 | 0.00% |
| Sefster vs Kuma | 2–0 | 100.00% |
| Sefster vs Panda | 0–2 | 0.00% |
| Sefster vs Lee | 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.