| Mercy vs King | 13–9 | 59.09% |
| Mercy vs Bryan | 13–9 | 59.09% |
| Mercy vs Yoshimitsu | 14–2 | 87.50% |
| Mercy vs Lars | 5–9 | 35.71% |
| Mercy vs Steve | 8–5 | 61.54% |
| Mercy vs Paul | 11–1 | 91.67% |
| Mercy vs Feng | 9–2 | 81.82% |
| Mercy vs Dragunov | 5–6 | 45.45% |
| Mercy vs Hwoarang | 9–1 | 90.00% |
| Mercy vs Claudio | 5–5 | 50.00% |
| Mercy vs Jin | 6–3 | 66.67% |
| Mercy vs Asuka | 2–6 | 25.00% |
| Mercy vs Reina | 7–1 | 87.50% |
| Mercy vs Eddy | 3–5 | 37.50% |
| Mercy vs Jack-8 | 5–2 | 71.43% |
| Mercy vs Leo | 6–1 | 85.71% |
| Mercy vs Leroy | 5–2 | 71.43% |
| Mercy vs Victor | 5–2 | 71.43% |
| Mercy vs Lili | 4–2 | 66.67% |
| Mercy vs Azucena | 5–1 | 83.33% |
| Mercy vs Xiaoyu | 0–5 | 0.00% |
| Mercy vs Alisa | 3–2 | 60.00% |
| Mercy vs Raven | 5–0 | 100.00% |
| Mercy vs Kazuya | 0–3 | 0.00% |
| Mercy vs Nina | 3–0 | 100.00% |
| Mercy vs Kuma | 3–0 | 100.00% |
| Mercy vs Jun | 1–2 | 33.33% |
| Mercy vs Law | 2–0 | 100.00% |
| Mercy vs Devil Jin | 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.