| ONeill vs Hwoarang | 19–18 | 51.35% |
| ONeill vs Jin | 19–16 | 54.29% |
| ONeill vs Reina | 21–13 | 61.76% |
| ONeill vs Law | 20–13 | 60.61% |
| ONeill vs Kazuya | 14–19 | 42.42% |
| ONeill vs Bryan | 17–15 | 53.12% |
| ONeill vs Yoshimitsu | 13–13 | 50.00% |
| ONeill vs King | 15–10 | 60.00% |
| ONeill vs Jun | 13–9 | 59.09% |
| ONeill vs Steve | 10–10 | 50.00% |
| ONeill vs Lars | 6–14 | 30.00% |
| ONeill vs Lili | 9–6 | 60.00% |
| ONeill vs Dragunov | 7–8 | 46.67% |
| ONeill vs Xiaoyu | 9–5 | 64.29% |
| ONeill vs Eddy | 7–7 | 50.00% |
| ONeill vs Asuka | 9–4 | 69.23% |
| ONeill vs Paul | 5–7 | 41.67% |
| ONeill vs Devil Jin | 5–7 | 41.67% |
| ONeill vs Feng | 4–8 | 33.33% |
| ONeill vs Azucena | 6–6 | 50.00% |
| ONeill vs Nina | 6–5 | 54.55% |
| ONeill vs Lee | 3–8 | 27.27% |
| ONeill vs Alisa | 3–6 | 33.33% |
| ONeill vs Victor | 4–5 | 44.44% |
| ONeill vs Kuma | 1–4 | 20.00% |
| ONeill vs Raven | 0–4 | 0.00% |
| ONeill vs Leo | 2–0 | 100.00% |
| ONeill vs Claudio | 2–0 | 100.00% |
| ONeill vs Shaheen | 2–0 | 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.