| HapiWilliams vs King | 29–19 | 60.42% |
| HapiWilliams vs Jin | 25–13 | 65.79% |
| HapiWilliams vs Bryan | 16–16 | 50.00% |
| HapiWilliams vs Law | 14–17 | 45.16% |
| HapiWilliams vs Yoshimitsu | 14–15 | 48.28% |
| HapiWilliams vs Kazuya | 10–19 | 34.48% |
| HapiWilliams vs Devil Jin | 11–14 | 44.00% |
| HapiWilliams vs Steve | 11–13 | 45.83% |
| HapiWilliams vs Nina | 17–7 | 70.83% |
| HapiWilliams vs Dragunov | 15–8 | 65.22% |
| HapiWilliams vs Reina | 11–11 | 50.00% |
| HapiWilliams vs Eddy | 11–11 | 50.00% |
| HapiWilliams vs Hwoarang | 6–12 | 33.33% |
| HapiWilliams vs Feng | 10–5 | 66.67% |
| HapiWilliams vs Jun | 10–5 | 66.67% |
| HapiWilliams vs Lili | 7–7 | 50.00% |
| HapiWilliams vs Jack-8 | 1–10 | 9.09% |
| HapiWilliams vs Lee | 6–5 | 54.55% |
| HapiWilliams vs Asuka | 5–5 | 50.00% |
| HapiWilliams vs Alisa | 6–4 | 60.00% |
| HapiWilliams vs Victor | 3–7 | 30.00% |
| HapiWilliams vs Azucena | 5–4 | 55.56% |
| HapiWilliams vs Paul | 2–6 | 25.00% |
| HapiWilliams vs Leo | 2–6 | 25.00% |
| HapiWilliams vs Lars | 2–6 | 25.00% |
| HapiWilliams vs Panda | 4–4 | 50.00% |
| HapiWilliams vs Shaheen | 5–1 | 83.33% |
| HapiWilliams vs Kuma | 0–6 | 0.00% |
| HapiWilliams vs Xiaoyu | 1–4 | 20.00% |
| HapiWilliams vs Leroy | 2–3 | 40.00% |
| HapiWilliams vs Zafina | 2–2 | 50.00% |
| HapiWilliams vs Raven | 2–2 | 50.00% |
| HapiWilliams vs Claudio | 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.