| Mayhem vs Reina | 19–18 | 51.35% |
| Mayhem vs King | 10–20 | 33.33% |
| Mayhem vs Dragunov | 9–15 | 37.50% |
| Mayhem vs Lili | 6–15 | 28.57% |
| Mayhem vs Bryan | 12–5 | 70.59% |
| Mayhem vs Asuka | 4–13 | 23.53% |
| Mayhem vs Xiaoyu | 7–9 | 43.75% |
| Mayhem vs Devil Jin | 6–8 | 42.86% |
| Mayhem vs Jun | 9–5 | 64.29% |
| Mayhem vs Azucena | 4–9 | 30.77% |
| Mayhem vs Lars | 4–8 | 33.33% |
| Mayhem vs Yoshimitsu | 5–5 | 50.00% |
| Mayhem vs Hwoarang | 2–8 | 20.00% |
| Mayhem vs Eddy | 1–8 | 11.11% |
| Mayhem vs Kazuya | 2–6 | 25.00% |
| Mayhem vs Paul | 2–5 | 28.57% |
| Mayhem vs Law | 2–5 | 28.57% |
| Mayhem vs Steve | 3–4 | 42.86% |
| Mayhem vs Victor | 3–4 | 42.86% |
| Mayhem vs Jin | 1–5 | 16.67% |
| Mayhem vs Nina | 1–5 | 16.67% |
| Mayhem vs Alisa | 4–1 | 80.00% |
| Mayhem vs Shaheen | 0–5 | 0.00% |
| Mayhem vs Lidia | 1–4 | 20.00% |
| Mayhem vs Leroy | 4–0 | 100.00% |
| Mayhem vs Feng | 0–3 | 0.00% |
| Mayhem vs Lee | 2–1 | 66.67% |
| Mayhem vs Kuma | 1–2 | 33.33% |
| Mayhem vs Zafina | 3–0 | 100.00% |
| Mayhem vs Jack-8 | 0–2 | 0.00% |
| Mayhem vs Leo | 0–2 | 0.00% |
| Mayhem vs Panda | 2–0 | 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.