| John Weak vs King | 78–72 | 52.00% |
| John Weak vs Kazuya | 87–61 | 58.78% |
| John Weak vs Jin | 66–77 | 46.15% |
| John Weak vs Dragunov | 67–72 | 48.20% |
| John Weak vs Paul | 60–69 | 46.51% |
| John Weak vs Bryan | 46–65 | 41.44% |
| John Weak vs Victor | 48–55 | 46.60% |
| John Weak vs Law | 43–49 | 46.74% |
| John Weak vs Lili | 43–49 | 46.74% |
| John Weak vs Reina | 47–45 | 51.09% |
| John Weak vs Steve | 48–43 | 52.75% |
| John Weak vs Hwoarang | 43–41 | 51.19% |
| John Weak vs Yoshimitsu | 41–38 | 51.90% |
| John Weak vs Devil Jin | 39–36 | 52.00% |
| John Weak vs Asuka | 39–32 | 54.93% |
| John Weak vs Azucena | 34–35 | 49.28% |
| John Weak vs Eddy | 34–35 | 49.28% |
| John Weak vs Heihachi | 22–38 | 36.67% |
| John Weak vs Lars | 24–34 | 41.38% |
| John Weak vs Jun | 32–26 | 55.17% |
| John Weak vs Alisa | 23–32 | 41.82% |
| John Weak vs Leroy | 26–29 | 47.27% |
| John Weak vs Lee | 29–24 | 54.72% |
| John Weak vs Leo | 21–27 | 43.75% |
| John Weak vs Kuma | 18–27 | 40.00% |
| John Weak vs Feng | 19–23 | 45.24% |
| John Weak vs Xiaoyu | 24–17 | 58.54% |
| John Weak vs Nina | 20–19 | 51.28% |
| John Weak vs Lidia | 20–19 | 51.28% |
| John Weak vs Claudio | 19–19 | 50.00% |
| John Weak vs Raven | 9–15 | 37.50% |
| John Weak vs Clive | 9–14 | 39.13% |
| John Weak vs Shaheen | 8–14 | 36.36% |
| John Weak vs Jack-8 | 8–12 | 40.00% |
| John Weak vs Fahkumram | 11–8 | 57.89% |
| John Weak vs Anna | 5–8 | 38.46% |
| John Weak vs Panda | 2–8 | 20.00% |
| John Weak vs Zafina | 4–6 | 40.00% |
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.