| Sai9000 vs King | 90–123 | 42.25% |
| Sai9000 vs Kazuya | 95–95 | 50.00% |
| Sai9000 vs Reina | 94–89 | 51.37% |
| Sai9000 vs Jin | 62–110 | 36.05% |
| Sai9000 vs Law | 84–69 | 54.90% |
| Sai9000 vs Bryan | 66–78 | 45.83% |
| Sai9000 vs Steve | 62–65–1 | 48.82% |
| Sai9000 vs Eddy | 69–47 | 59.48% |
| Sai9000 vs Lili | 51–58 | 46.79% |
| Sai9000 vs Hwoarang | 48–58 | 45.28% |
| Sai9000 vs Paul | 38–62 | 38.00% |
| Sai9000 vs Jun | 64–35 | 64.65% |
| Sai9000 vs Heihachi | 33–59 | 35.87% |
| Sai9000 vs Yoshimitsu | 46–45 | 50.55% |
| Sai9000 vs Azucena | 44–46 | 48.89% |
| Sai9000 vs Dragunov | 29–55 | 34.52% |
| Sai9000 vs Armor King | 34–48 | 41.46% |
| Sai9000 vs Lars | 39–39 | 50.00% |
| Sai9000 vs Lee | 31–40 | 43.66% |
| Sai9000 vs Asuka | 44–26 | 62.86% |
| Sai9000 vs Victor | 30–39 | 43.48% |
| Sai9000 vs Xiaoyu | 33–30 | 52.38% |
| Sai9000 vs Nina | 35–24 | 59.32% |
| Sai9000 vs Leroy | 20–35 | 36.36% |
| Sai9000 vs Alisa | 23–28 | 45.10% |
| Sai9000 vs Fahkumram | 22–25 | 46.81% |
| Sai9000 vs Raven | 21–23 | 47.73% |
| Sai9000 vs Devil Jin | 14–29 | 32.56% |
| Sai9000 vs Feng | 18–23 | 43.90% |
| Sai9000 vs Lidia | 17–24 | 41.46% |
| Sai9000 vs Clive | 17–23 | 42.50% |
| Sai9000 vs Leo | 24–15 | 61.54% |
| Sai9000 vs Claudio | 9–20 | 31.03% |
| Sai9000 vs Jack-8 | 16–12 | 57.14% |
| Sai9000 vs Kuma | 11–17 | 39.29% |
| Sai9000 vs Miary Zo | 10–14 | 41.67% |
| Sai9000 vs Anna | 11–12 | 47.83% |
| Sai9000 vs Shaheen | 8–10 | 44.44% |
| Sai9000 vs Zafina | 0–16 | 0.00% |
| Sai9000 vs Panda | 2–5 | 28.57% |
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.