| Lee Siomai vs Hwoarang | 30–19 | 61.22% |
| Lee Siomai vs Dragunov | 23–17 | 57.50% |
| Lee Siomai vs King | 21–16 | 56.76% |
| Lee Siomai vs Kazuya | 17–15 | 53.12% |
| Lee Siomai vs Jin | 24–7 | 77.42% |
| Lee Siomai vs Lili | 16–12 | 57.14% |
| Lee Siomai vs Reina | 23–4 | 85.19% |
| Lee Siomai vs Heihachi | 15–9 | 62.50% |
| Lee Siomai vs Yoshimitsu | 12–11 | 52.17% |
| Lee Siomai vs Paul | 5–17 | 22.73% |
| Lee Siomai vs Bryan | 14–8 | 63.64% |
| Lee Siomai vs Steve | 13–7 | 65.00% |
| Lee Siomai vs Lee | 11–6 | 64.71% |
| Lee Siomai vs Devil Jin | 11–5 | 68.75% |
| Lee Siomai vs Lars | 6–8 | 42.86% |
| Lee Siomai vs Xiaoyu | 7–5 | 58.33% |
| Lee Siomai vs Asuka | 3–9 | 25.00% |
| Lee Siomai vs Kuma | 5–7 | 41.67% |
| Lee Siomai vs Victor | 6–6 | 50.00% |
| Lee Siomai vs Law | 2–9 | 18.18% |
| Lee Siomai vs Leroy | 5–6 | 45.45% |
| Lee Siomai vs Leo | 6–4 | 60.00% |
| Lee Siomai vs Jun | 5–5 | 50.00% |
| Lee Siomai vs Azucena | 8–2 | 80.00% |
| Lee Siomai vs Feng | 2–7 | 22.22% |
| Lee Siomai vs Lidia | 5–3 | 62.50% |
| Lee Siomai vs Shaheen | 3–4 | 42.86% |
| Lee Siomai vs Anna | 2–5 | 28.57% |
| Lee Siomai vs Armor King | 3–4 | 42.86% |
| Lee Siomai vs Clive | 0–6 | 0.00% |
| Lee Siomai vs Claudio | 2–3 | 40.00% |
| Lee Siomai vs Nina | 5–0 | 100.00% |
| Lee Siomai vs Alisa | 3–0 | 100.00% |
| Lee Siomai vs Zafina | 1–2 | 33.33% |
| Lee Siomai vs Jack-8 | 0–2 | 0.00% |
| Lee Siomai vs Panda | 2–0 | 100.00% |
| Lee Siomai vs Raven | 1–1 | 50.00% |
| Lee Siomai vs Fahkumram | 0–2 | 0.00% |
| Lee Siomai vs Eddy | 1–0 | 100.00% |
| Lee Siomai vs Miary Zo | 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.