| MERCILESS vs Kazuya | 6–21 | 22.22% |
| MERCILESS vs Hwoarang | 10–6 | 62.50% |
| MERCILESS vs Eddy | 4–11 | 26.67% |
| MERCILESS vs Jin | 8–4 | 66.67% |
| MERCILESS vs Steve | 5–6 | 45.45% |
| MERCILESS vs Clive | 2–8 | 20.00% |
| MERCILESS vs Lili | 1–7 | 12.50% |
| MERCILESS vs Bryan | 2–5 | 28.57% |
| MERCILESS vs Reina | 4–3 | 57.14% |
| MERCILESS vs Law | 2–4 | 33.33% |
| MERCILESS vs King | 2–4 | 33.33% |
| MERCILESS vs Jun | 2–4 | 33.33% |
| MERCILESS vs Paul | 2–3 | 40.00% |
| MERCILESS vs Nina | 2–3 | 40.00% |
| MERCILESS vs Kuma | 3–1 | 75.00% |
| MERCILESS vs Azucena | 2–2 | 50.00% |
| MERCILESS vs Lidia | 1–3 | 25.00% |
| MERCILESS vs Heihachi | 2–2 | 50.00% |
| MERCILESS vs Anna | 1–3 | 25.00% |
| MERCILESS vs Lars | 1–2 | 33.33% |
| MERCILESS vs Alisa | 3–0 | 100.00% |
| MERCILESS vs Leroy | 3–0 | 100.00% |
| MERCILESS vs Yoshimitsu | 2–0 | 100.00% |
| MERCILESS vs Xiaoyu | 0–2 | 0.00% |
| MERCILESS vs Asuka | 0–2 | 0.00% |
| MERCILESS vs Devil Jin | 1–1 | 50.00% |
| MERCILESS vs Feng | 0–2 | 0.00% |
| MERCILESS vs Victor | 0–2 | 0.00% |
| MERCILESS vs Dragunov | 1–0 | 100.00% |
| MERCILESS vs Claudio | 1–0 | 100.00% |
| MERCILESS vs Lee | 1–0 | 100.00% |
| MERCILESS vs Zafina | 1–0 | 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.