| Medusa vs Jin | 153–69 | 68.92% |
| Medusa vs Kazuya | 99–80 | 55.31% |
| Medusa vs King | 94–43 | 68.61% |
| Medusa vs Bryan | 67–69 | 49.26% |
| Medusa vs Heihachi | 73–50 | 59.35% |
| Medusa vs Dragunov | 57–40 | 58.76% |
| Medusa vs Hwoarang | 47–34 | 58.02% |
| Medusa vs Steve | 43–33 | 56.58% |
| Medusa vs Armor King | 36–38 | 48.65% |
| Medusa vs Jun | 34–39 | 46.58% |
| Medusa vs Reina | 44–29 | 60.27% |
| Medusa vs Clive | 42–28 | 60.00% |
| Medusa vs Lee | 45–24 | 65.22% |
| Medusa vs Law | 38–30 | 55.88% |
| Medusa vs Lili | 31–30 | 50.82% |
| Medusa vs Jack-8 | 34–22 | 60.71% |
| Medusa vs Alisa | 29–23 | 55.77% |
| Medusa vs Yoshimitsu | 35–15 | 70.00% |
| Medusa vs Nina | 21–27 | 43.75% |
| Medusa vs Lars | 22–24 | 47.83% |
| Medusa vs Asuka | 20–25 | 44.44% |
| Medusa vs Leo | 24–21 | 53.33% |
| Medusa vs Eddy | 29–16 | 64.44% |
| Medusa vs Devil Jin | 26–18 | 59.09% |
| Medusa vs Azucena | 29–14 | 67.44% |
| Medusa vs Feng | 26–15 | 63.41% |
| Medusa vs Paul | 17–22 | 43.59% |
| Medusa vs Victor | 15–21 | 41.67% |
| Medusa vs Leroy | 19–12 | 61.29% |
| Medusa vs Xiaoyu | 18–12 | 60.00% |
| Medusa vs Fahkumram | 21–9 | 70.00% |
| Medusa vs Lidia | 15–14 | 51.72% |
| Medusa vs Raven | 10–13 | 43.48% |
| Medusa vs Zafina | 10–9 | 52.63% |
| Medusa vs Anna | 9–8 | 52.94% |
| Medusa vs Claudio | 8–4 | 66.67% |
| Medusa vs Shaheen | 2–7 | 22.22% |
| Medusa vs Kuma | 3–5 | 37.50% |
| Medusa vs Panda | 1–2 | 33.33% |
| Medusa vs Miary Zo | 0–2 | 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.