| Willian Kleyber vs Kazuya | 19–9 | 67.86% |
| Willian Kleyber vs King | 8–17 | 32.00% |
| Willian Kleyber vs Jin | 14–10 | 58.33% |
| Willian Kleyber vs Reina | 11–13 | 45.83% |
| Willian Kleyber vs Asuka | 13–9 | 59.09% |
| Willian Kleyber vs Lidia | 11–10 | 52.38% |
| Willian Kleyber vs Steve | 5–9 | 35.71% |
| Willian Kleyber vs Dragunov | 7–6 | 53.85% |
| Willian Kleyber vs Yoshimitsu | 5–7 | 41.67% |
| Willian Kleyber vs Bryan | 4–7 | 36.36% |
| Willian Kleyber vs Azucena | 5–4 | 55.56% |
| Willian Kleyber vs Feng | 2–6 | 25.00% |
| Willian Kleyber vs Lili | 6–2 | 75.00% |
| Willian Kleyber vs Nina | 2–6 | 25.00% |
| Willian Kleyber vs Law | 3–3 | 50.00% |
| Willian Kleyber vs Devil Jin | 2–4 | 33.33% |
| Willian Kleyber vs Jack-8 | 3–2 | 60.00% |
| Willian Kleyber vs Hwoarang | 0–4 | 0.00% |
| Willian Kleyber vs Lee | 1–3 | 25.00% |
| Willian Kleyber vs Kuma | 2–2 | 50.00% |
| Willian Kleyber vs Panda | 4–0 | 100.00% |
| Willian Kleyber vs Zafina | 4–0 | 100.00% |
| Willian Kleyber vs Miary Zo | 0–4 | 0.00% |
| Willian Kleyber vs Leo | 2–1 | 66.67% |
| Willian Kleyber vs Claudio | 1–2 | 33.33% |
| Willian Kleyber vs Paul | 0–2 | 0.00% |
| Willian Kleyber vs Raven | 2–0 | 100.00% |
| Willian Kleyber vs Eddy | 0–2 | 0.00% |
| Willian Kleyber vs Shaheen | 1–0 | 100.00% |
| Willian Kleyber vs Jun | 0–1 | 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.