| Leffy vs Reina | 11–12 | 47.83% |
| Leffy vs Lidia | 10–6 | 62.50% |
| Leffy vs Hwoarang | 7–8 | 46.67% |
| Leffy vs Law | 7–6 | 53.85% |
| Leffy vs Lili | 4–9 | 30.77% |
| Leffy vs Jin | 7–4 | 63.64% |
| Leffy vs Yoshimitsu | 4–6 | 40.00% |
| Leffy vs Kazuya | 5–5 | 50.00% |
| Leffy vs Dragunov | 6–4 | 60.00% |
| Leffy vs Nina | 10–0 | 100.00% |
| Leffy vs Jun | 5–5 | 50.00% |
| Leffy vs Lars | 7–2 | 77.78% |
| Leffy vs Eddy | 4–5 | 44.44% |
| Leffy vs King | 3–5 | 37.50% |
| Leffy vs Bryan | 4–4 | 50.00% |
| Leffy vs Steve | 5–2 | 71.43% |
| Leffy vs Asuka | 4–1 | 80.00% |
| Leffy vs Alisa | 3–2 | 60.00% |
| Leffy vs Zafina | 5–0 | 100.00% |
| Leffy vs Azucena | 3–2 | 60.00% |
| Leffy vs Lee | 1–3 | 25.00% |
| Leffy vs Feng | 2–1 | 66.67% |
| Leffy vs Kuma | 3–0 | 100.00% |
| Leffy vs Paul | 0–2 | 0.00% |
| Leffy vs Xiaoyu | 2–0 | 100.00% |
| Leffy vs Jack-8 | 0–2 | 0.00% |
| Leffy vs Leo | 2–0 | 100.00% |
| Leffy vs Shaheen | 1–1 | 50.00% |
| Leffy vs Devil Jin | 0–1 | 0.00% |
| Leffy vs Raven | 1–0 | 100.00% |
| Leffy vs Anna | 0–1 | 0.00% |
| Leffy vs Fahkumram | 0–1 | 0.00% |
| Leffy vs Armor King | 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.