| WiL_B420 vs King | 338–367 | 47.94% |
| WiL_B420 vs Kazuya | 300–352 | 46.01% |
| WiL_B420 vs Jin | 301–287 | 51.19% |
| WiL_B420 vs Reina | 212–304 | 41.09% |
| WiL_B420 vs Bryan | 197–293 | 40.20% |
| WiL_B420 vs Steve | 183–228 | 44.53% |
| WiL_B420 vs Hwoarang | 165–244 | 40.34% |
| WiL_B420 vs Yoshimitsu | 141–216–11 | 39.50% |
| WiL_B420 vs Dragunov | 184–162 | 53.18% |
| WiL_B420 vs Azucena | 147–197 | 42.73% |
| WiL_B420 vs Law | 160–162 | 49.69% |
| WiL_B420 vs Eddy | 141–176 | 44.48% |
| WiL_B420 vs Xiaoyu | 148–160 | 48.05% |
| WiL_B420 vs Paul | 133–156–1 | 46.02% |
| WiL_B420 vs Lili | 135–154 | 46.71% |
| WiL_B420 vs Jun | 132–156 | 45.83% |
| WiL_B420 vs Victor | 129–157 | 45.10% |
| WiL_B420 vs Asuka | 138–137–1 | 50.18% |
| WiL_B420 vs Lee | 124–137 | 47.51% |
| WiL_B420 vs Lars | 93–125 | 42.66% |
| WiL_B420 vs Nina | 82–119 | 40.80% |
| WiL_B420 vs Raven | 88–106 | 45.36% |
| WiL_B420 vs Feng | 89–98 | 47.59% |
| WiL_B420 vs Alisa | 63–112 | 36.00% |
| WiL_B420 vs Leroy | 83–83 | 50.00% |
| WiL_B420 vs Devil Jin | 59–98 | 37.58% |
| WiL_B420 vs Leo | 62–74 | 45.59% |
| WiL_B420 vs Kuma | 55–76 | 41.98% |
| WiL_B420 vs Lidia | 71–57 | 55.47% |
| WiL_B420 vs Heihachi | 64–61 | 51.20% |
| WiL_B420 vs Claudio | 52–61 | 46.02% |
| WiL_B420 vs Jack-8 | 68–44 | 60.71% |
| WiL_B420 vs Shaheen | 41–50 | 45.05% |
| WiL_B420 vs Zafina | 49–36 | 57.65% |
| WiL_B420 vs Armor King | 34–41 | 45.33% |
| WiL_B420 vs Miary Zo | 30–32 | 48.39% |
| WiL_B420 vs Clive | 34–19 | 64.15% |
| WiL_B420 vs Panda | 13–19 | 40.62% |
| WiL_B420 vs Fahkumram | 10–13 | 43.48% |
| WiL_B420 vs Anna | 2–4 | 33.33% |
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.