| Kai Mayne vs Jin | 156–182 | 46.15% |
| Kai Mayne vs King | 151–179 | 45.76% |
| Kai Mayne vs Bryan | 128–162 | 44.14% |
| Kai Mayne vs Kazuya | 130–147 | 46.93% |
| Kai Mayne vs Hwoarang | 107–120–2 | 47.14% |
| Kai Mayne vs Steve | 97–105 | 48.02% |
| Kai Mayne vs Dragunov | 81–114 | 41.54% |
| Kai Mayne vs Paul | 79–83 | 48.77% |
| Kai Mayne vs Reina | 82–78 | 51.25% |
| Kai Mayne vs Law | 74–81 | 47.74% |
| Kai Mayne vs Lee | 62–86 | 41.89% |
| Kai Mayne vs Lili | 64–80 | 44.44% |
| Kai Mayne vs Yoshimitsu | 58–76 | 43.28% |
| Kai Mayne vs Nina | 46–75 | 38.02% |
| Kai Mayne vs Devil Jin | 66–53 | 55.46% |
| Kai Mayne vs Feng | 57–57 | 50.00% |
| Kai Mayne vs Heihachi | 50–64 | 43.86% |
| Kai Mayne vs Eddy | 52–52 | 50.00% |
| Kai Mayne vs Lars | 44–49 | 47.31% |
| Kai Mayne vs Victor | 38–50 | 43.18% |
| Kai Mayne vs Jun | 46–41 | 52.87% |
| Kai Mayne vs Azucena | 37–50 | 42.53% |
| Kai Mayne vs Alisa | 35–51 | 40.70% |
| Kai Mayne vs Xiaoyu | 40–44 | 47.62% |
| Kai Mayne vs Asuka | 30–52 | 36.59% |
| Kai Mayne vs Jack-8 | 37–33 | 52.86% |
| Kai Mayne vs Kuma | 21–36 | 36.84% |
| Kai Mayne vs Leo | 27–23 | 54.00% |
| Kai Mayne vs Leroy | 19–27 | 41.30% |
| Kai Mayne vs Shaheen | 19–24 | 44.19% |
| Kai Mayne vs Clive | 14–25 | 35.90% |
| Kai Mayne vs Claudio | 11–24 | 31.43% |
| Kai Mayne vs Fahkumram | 18–15 | 54.55% |
| Kai Mayne vs Panda | 8–23 | 25.81% |
| Kai Mayne vs Lidia | 13–15 | 46.43% |
| Kai Mayne vs Armor King | 12–16 | 42.86% |
| Kai Mayne vs Zafina | 14–9 | 60.87% |
| Kai Mayne vs Raven | 9–14 | 39.13% |
| Kai Mayne vs Anna | 6–10 | 37.50% |
| Kai Mayne vs Miary Zo | 6–6 | 50.00% |
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.