| Zack Valentine vs Reina | 14–6 | 70.00% |
| Zack Valentine vs Law | 12–4 | 75.00% |
| Zack Valentine vs King | 7–9 | 43.75% |
| Zack Valentine vs Devil Jin | 9–6 | 60.00% |
| Zack Valentine vs Eddy | 6–9 | 40.00% |
| Zack Valentine vs Hwoarang | 9–5 | 64.29% |
| Zack Valentine vs Yoshimitsu | 4–9 | 30.77% |
| Zack Valentine vs Lidia | 7–6 | 53.85% |
| Zack Valentine vs Kazuya | 4–8 | 33.33% |
| Zack Valentine vs Lili | 9–2–1 | 81.82% |
| Zack Valentine vs Paul | 3–6 | 33.33% |
| Zack Valentine vs Jin | 4–4 | 50.00% |
| Zack Valentine vs Jack-8 | 3–5 | 37.50% |
| Zack Valentine vs Alisa | 5–3 | 62.50% |
| Zack Valentine vs Victor | 3–4 | 42.86% |
| Zack Valentine vs Clive | 4–3 | 57.14% |
| Zack Valentine vs Jun | 1–5 | 16.67% |
| Zack Valentine vs Xiaoyu | 4–1 | 80.00% |
| Zack Valentine vs Bryan | 2–3 | 40.00% |
| Zack Valentine vs Asuka | 1–4 | 20.00% |
| Zack Valentine vs Feng | 3–2 | 60.00% |
| Zack Valentine vs Lars | 2–3 | 40.00% |
| Zack Valentine vs Azucena | 2–3 | 40.00% |
| Zack Valentine vs Leo | 2–2 | 50.00% |
| Zack Valentine vs Steve | 0–2 | 0.00% |
| Zack Valentine vs Nina | 0–2 | 0.00% |
| Zack Valentine vs Kuma | 0–2 | 0.00% |
| Zack Valentine vs Leroy | 0–2 | 0.00% |
| Zack Valentine vs Heihachi | 2–0 | 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.