| Mephorum vs Reina | 13–22 | 37.14% |
| Mephorum vs Kazuya | 14–12 | 53.85% |
| Mephorum vs Law | 16–9 | 64.00% |
| Mephorum vs Heihachi | 14–11 | 56.00% |
| Mephorum vs Jin | 11–12 | 47.83% |
| Mephorum vs Bryan | 14–8 | 63.64% |
| Mephorum vs Hwoarang | 9–12 | 42.86% |
| Mephorum vs Dragunov | 13–8 | 61.90% |
| Mephorum vs Clive | 10–11 | 47.62% |
| Mephorum vs Steve | 6–14 | 30.00% |
| Mephorum vs Jun | 11–9 | 55.00% |
| Mephorum vs King | 6–12 | 33.33% |
| Mephorum vs Lidia | 9–5 | 64.29% |
| Mephorum vs Yoshimitsu | 7–5 | 58.33% |
| Mephorum vs Xiaoyu | 4–7 | 36.36% |
| Mephorum vs Asuka | 8–3 | 72.73% |
| Mephorum vs Azucena | 6–5 | 54.55% |
| Mephorum vs Feng | 4–5 | 44.44% |
| Mephorum vs Armor King | 4–5 | 44.44% |
| Mephorum vs Devil Jin | 4–4 | 50.00% |
| Mephorum vs Kuma | 6–2 | 75.00% |
| Mephorum vs Leroy | 5–3 | 62.50% |
| Mephorum vs Raven | 5–3 | 62.50% |
| Mephorum vs Paul | 5–2 | 71.43% |
| Mephorum vs Lars | 1–6 | 14.29% |
| Mephorum vs Anna | 3–3 | 50.00% |
| Mephorum vs Fahkumram | 2–4 | 33.33% |
| Mephorum vs Jack-8 | 3–2 | 60.00% |
| Mephorum vs Alisa | 2–3 | 40.00% |
| Mephorum vs Eddy | 3–2 | 60.00% |
| Mephorum vs Lili | 4–0 | 100.00% |
| Mephorum vs Claudio | 2–2 | 50.00% |
| Mephorum vs Zafina | 2–2 | 50.00% |
| Mephorum vs Victor | 3–1 | 75.00% |
| Mephorum vs Shaheen | 0–3 | 0.00% |
| Mephorum vs Lee | 2–1 | 66.67% |
| Mephorum vs Nina | 1–1 | 50.00% |
| Mephorum vs Leo | 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.