| Waterboy21 vs King | 4–12 | 25.00% |
| Waterboy21 vs Jin | 10–5 | 66.67% |
| Waterboy21 vs Clive | 6–6 | 50.00% |
| Waterboy21 vs Steve | 5–6 | 45.45% |
| Waterboy21 vs Lee | 2–9 | 18.18% |
| Waterboy21 vs Reina | 2–8 | 20.00% |
| Waterboy21 vs Anna | 4–6 | 40.00% |
| Waterboy21 vs Lili | 4–5 | 44.44% |
| Waterboy21 vs Azucena | 2–7 | 22.22% |
| Waterboy21 vs Victor | 4–5 | 44.44% |
| Waterboy21 vs Hwoarang | 4–3 | 57.14% |
| Waterboy21 vs Kazuya | 3–4 | 42.86% |
| Waterboy21 vs Fahkumram | 3–4 | 42.86% |
| Waterboy21 vs Yoshimitsu | 1–5 | 16.67% |
| Waterboy21 vs Devil Jin | 2–4 | 33.33% |
| Waterboy21 vs Leo | 3–3 | 50.00% |
| Waterboy21 vs Jun | 2–4 | 33.33% |
| Waterboy21 vs Law | 3–2 | 60.00% |
| Waterboy21 vs Asuka | 2–3 | 40.00% |
| Waterboy21 vs Dragunov | 0–5 | 0.00% |
| Waterboy21 vs Xiaoyu | 2–2 | 50.00% |
| Waterboy21 vs Shaheen | 2–2 | 50.00% |
| Waterboy21 vs Feng | 1–2 | 33.33% |
| Waterboy21 vs Claudio | 1–2 | 33.33% |
| Waterboy21 vs Lidia | 1–2 | 33.33% |
| Waterboy21 vs Heihachi | 0–3 | 0.00% |
| Waterboy21 vs Bryan | 0–2 | 0.00% |
| Waterboy21 vs Jack-8 | 0–2 | 0.00% |
| Waterboy21 vs Alisa | 0–2 | 0.00% |
| Waterboy21 vs Leroy | 1–1 | 50.00% |
| Waterboy21 vs Eddy | 0–2 | 0.00% |
| Waterboy21 vs Armor King | 0–2 | 0.00% |
| Waterboy21 vs Nina | 1–0 | 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.