| Jarl Hefnir vs Reina | 10–0 | 100.00% |
| Jarl Hefnir vs King | 4–3 | 57.14% |
| Jarl Hefnir vs Steve | 3–4 | 42.86% |
| Jarl Hefnir vs Law | 4–1 | 80.00% |
| Jarl Hefnir vs Hwoarang | 1–4 | 20.00% |
| Jarl Hefnir vs Nina | 2–3 | 40.00% |
| Jarl Hefnir vs Jun | 5–0 | 100.00% |
| Jarl Hefnir vs Clive | 1–4 | 20.00% |
| Jarl Hefnir vs Armor King | 3–2 | 60.00% |
| Jarl Hefnir vs Bryan | 1–3 | 25.00% |
| Jarl Hefnir vs Xiaoyu | 0–3 | 0.00% |
| Jarl Hefnir vs Alisa | 2–1 | 66.67% |
| Jarl Hefnir vs Kuma | 1–2 | 33.33% |
| Jarl Hefnir vs Eddy | 1–2 | 33.33% |
| Jarl Hefnir vs Lidia | 1–2 | 33.33% |
| Jarl Hefnir vs Fahkumram | 2–1 | 66.67% |
| Jarl Hefnir vs Yoshimitsu | 0–2 | 0.00% |
| Jarl Hefnir vs Asuka | 2–0 | 100.00% |
| Jarl Hefnir vs Dragunov | 2–0 | 100.00% |
| Jarl Hefnir vs Shaheen | 1–1 | 50.00% |
| Jarl Hefnir vs Lee | 0–1–1 | 0.00% |
| Jarl Hefnir vs Zafina | 2–0 | 100.00% |
| Jarl Hefnir vs Azucena | 0–2 | 0.00% |
| Jarl Hefnir vs Jin | 1–0 | 100.00% |
| Jarl Hefnir vs Kazuya | 0–1 | 0.00% |
| Jarl Hefnir vs Victor | 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.