| Mastantuono vs Steve | 12–4 | 75.00% |
| Mastantuono vs King | 10–5 | 66.67% |
| Mastantuono vs Jun | 7–4 | 63.64% |
| Mastantuono vs Law | 4–3 | 57.14% |
| Mastantuono vs Jin | 6–1 | 85.71% |
| Mastantuono vs Dragunov | 6–1 | 85.71% |
| Mastantuono vs Hwoarang | 5–1 | 83.33% |
| Mastantuono vs Azucena | 4–2 | 66.67% |
| Mastantuono vs Fahkumram | 6–0 | 100.00% |
| Mastantuono vs Armor King | 4–2 | 66.67% |
| Mastantuono vs Bryan | 3–2 | 60.00% |
| Mastantuono vs Nina | 3–2 | 60.00% |
| Mastantuono vs Zafina | 3–2 | 60.00% |
| Mastantuono vs Lidia | 4–1 | 80.00% |
| Mastantuono vs Paul | 2–2 | 50.00% |
| Mastantuono vs Lars | 3–1 | 75.00% |
| Mastantuono vs Alisa | 2–2 | 50.00% |
| Mastantuono vs Leroy | 2–2 | 50.00% |
| Mastantuono vs Eddy | 2–2 | 50.00% |
| Mastantuono vs Heihachi | 2–2 | 50.00% |
| Mastantuono vs Lili | 3–0 | 100.00% |
| Mastantuono vs Leo | 0–3 | 0.00% |
| Mastantuono vs Lee | 1–2 | 33.33% |
| Mastantuono vs Raven | 2–1 | 66.67% |
| Mastantuono vs Victor | 0–2 | 0.00% |
| Mastantuono vs Clive | 2–0 | 100.00% |
| Mastantuono vs Anna | 2–0 | 100.00% |
| Mastantuono vs Yoshimitsu | 0–1 | 0.00% |
| Mastantuono vs Xiaoyu | 1–0 | 100.00% |
| Mastantuono vs Kazuya | 1–0 | 100.00% |
| Mastantuono vs Reina | 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.