| Hydrafiend vs Reina | 26–38 | 40.62% |
| Hydrafiend vs Steve | 13–28 | 31.71% |
| Hydrafiend vs King | 12–22 | 35.29% |
| Hydrafiend vs Jin | 4–26 | 13.33% |
| Hydrafiend vs Nina | 9–18 | 33.33% |
| Hydrafiend vs Leroy | 7–18 | 28.00% |
| Hydrafiend vs Eddy | 2–23 | 8.00% |
| Hydrafiend vs Azucena | 8–13 | 38.10% |
| Hydrafiend vs Lars | 5–15 | 25.00% |
| Hydrafiend vs Law | 4–15 | 21.05% |
| Hydrafiend vs Hwoarang | 11–8 | 57.89% |
| Hydrafiend vs Lili | 6–13 | 31.58% |
| Hydrafiend vs Victor | 6–13 | 31.58% |
| Hydrafiend vs Paul | 6–12 | 33.33% |
| Hydrafiend vs Asuka | 7–11 | 38.89% |
| Hydrafiend vs Jun | 1–17 | 5.56% |
| Hydrafiend vs Bryan | 4–12 | 25.00% |
| Hydrafiend vs Devil Jin | 6–10 | 37.50% |
| Hydrafiend vs Alisa | 5–11 | 31.25% |
| Hydrafiend vs Leo | 6–9 | 40.00% |
| Hydrafiend vs Yoshimitsu | 1–13 | 7.14% |
| Hydrafiend vs Lidia | 5–9 | 35.71% |
| Hydrafiend vs Kazuya | 4–8 | 33.33% |
| Hydrafiend vs Dragunov | 1–11 | 8.33% |
| Hydrafiend vs Shaheen | 3–7 | 30.00% |
| Hydrafiend vs Feng | 4–5 | 44.44% |
| Hydrafiend vs Lee | 2–7 | 22.22% |
| Hydrafiend vs Jack-8 | 3–5 | 37.50% |
| Hydrafiend vs Panda | 1–7 | 12.50% |
| Hydrafiend vs Heihachi | 4–4 | 50.00% |
| Hydrafiend vs Xiaoyu | 1–6 | 14.29% |
| Hydrafiend vs Zafina | 0–6 | 0.00% |
| Hydrafiend vs Clive | 2–4 | 33.33% |
| Hydrafiend vs Raven | 2–2 | 50.00% |
| Hydrafiend vs Claudio | 1–2 | 33.33% |
| Hydrafiend vs Anna | 0–3 | 0.00% |
| Hydrafiend vs Kuma | 1–1 | 50.00% |
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.