| Portnoy vs Dragunov | 99–78 | 55.93% |
| Portnoy vs Paul | 77–50 | 60.63% |
| Portnoy vs Kazuya | 84–40 | 67.74% |
| Portnoy vs Reina | 57–63 | 47.50% |
| Portnoy vs King | 75–42 | 64.10% |
| Portnoy vs Hwoarang | 67–50 | 57.26% |
| Portnoy vs Jin | 65–39 | 62.50% |
| Portnoy vs Bryan | 60–37 | 61.86% |
| Portnoy vs Steve | 46–45 | 50.55% |
| Portnoy vs Heihachi | 40–35 | 53.33% |
| Portnoy vs Lili | 53–20 | 72.60% |
| Portnoy vs Yoshimitsu | 29–35 | 45.31% |
| Portnoy vs Law | 37–22 | 62.71% |
| Portnoy vs Lee | 36–23 | 61.02% |
| Portnoy vs Asuka | 31–27 | 53.45% |
| Portnoy vs Devil Jin | 38–20 | 65.52% |
| Portnoy vs Jun | 31–23 | 57.41% |
| Portnoy vs Victor | 29–25 | 53.70% |
| Portnoy vs Nina | 21–27 | 43.75% |
| Portnoy vs Alisa | 22–25 | 46.81% |
| Portnoy vs Raven | 30–17 | 63.83% |
| Portnoy vs Feng | 28–18 | 60.87% |
| Portnoy vs Lidia | 27–19 | 58.70% |
| Portnoy vs Leo | 21–21 | 50.00% |
| Portnoy vs Jack-8 | 16–19 | 45.71% |
| Portnoy vs Azucena | 21–13 | 61.76% |
| Portnoy vs Clive | 12–20 | 37.50% |
| Portnoy vs Shaheen | 19–11 | 63.33% |
| Portnoy vs Lars | 12–17 | 41.38% |
| Portnoy vs Leroy | 15–14 | 51.72% |
| Portnoy vs Anna | 15–13 | 53.57% |
| Portnoy vs Xiaoyu | 14–11 | 56.00% |
| Portnoy vs Zafina | 8–17 | 32.00% |
| Portnoy vs Claudio | 14–10 | 58.33% |
| Portnoy vs Eddy | 10–11 | 47.62% |
| Portnoy vs Fahkumram | 9–6 | 60.00% |
| Portnoy vs Panda | 7–7 | 50.00% |
| Portnoy vs Kuma | 3–7 | 30.00% |
| Portnoy vs Miary Zo | 3–2 | 60.00% |
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.