| Mastok vs Kazuya | 58–38 | 60.42% |
| Mastok vs Jin | 46–44 | 51.11% |
| Mastok vs King | 34–26 | 56.67% |
| Mastok vs Law | 32–24 | 57.14% |
| Mastok vs Dragunov | 33–23 | 58.93% |
| Mastok vs Reina | 33–18 | 64.71% |
| Mastok vs Bryan | 32–18 | 64.00% |
| Mastok vs Paul | 26–22 | 54.17% |
| Mastok vs Yoshimitsu | 21–27 | 43.75% |
| Mastok vs Hwoarang | 25–23 | 52.08% |
| Mastok vs Lili | 26–20 | 56.52% |
| Mastok vs Devil Jin | 30–15 | 66.67% |
| Mastok vs Miary Zo | 14–25 | 35.90% |
| Mastok vs Lee | 17–20 | 45.95% |
| Mastok vs Steve | 19–16 | 54.29% |
| Mastok vs Leroy | 19–15 | 55.88% |
| Mastok vs Lars | 20–12 | 62.50% |
| Mastok vs Eddy | 17–13 | 56.67% |
| Mastok vs Xiaoyu | 14–13 | 51.85% |
| Mastok vs Leo | 21–4 | 84.00% |
| Mastok vs Feng | 12–11 | 52.17% |
| Mastok vs Jack-8 | 11–11 | 50.00% |
| Mastok vs Heihachi | 15–7 | 68.18% |
| Mastok vs Victor | 10–10 | 50.00% |
| Mastok vs Claudio | 10–8 | 55.56% |
| Mastok vs Azucena | 13–4 | 76.47% |
| Mastok vs Raven | 8–9 | 47.06% |
| Mastok vs Asuka | 8–8 | 50.00% |
| Mastok vs Alisa | 7–8 | 46.67% |
| Mastok vs Nina | 11–4 | 73.33% |
| Mastok vs Jun | 4–8 | 33.33% |
| Mastok vs Kuma | 5–5 | 50.00% |
| Mastok vs Anna | 2–6 | 25.00% |
| Mastok vs Shaheen | 4–3 | 57.14% |
| Mastok vs Fahkumram | 2–5 | 28.57% |
| Mastok vs Panda | 3–2 | 60.00% |
| Mastok vs Zafina | 3–1 | 75.00% |
| Mastok vs Lidia | 1–2 | 33.33% |
| Mastok vs Armor King | 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.