| Sleepy Serpent vs King | 31–16 | 65.96% |
| Sleepy Serpent vs Kazuya | 15–17 | 46.88% |
| Sleepy Serpent vs Bryan | 21–10 | 67.74% |
| Sleepy Serpent vs Law | 20–10 | 66.67% |
| Sleepy Serpent vs Reina | 17–11 | 60.71% |
| Sleepy Serpent vs Victor | 12–11 | 52.17% |
| Sleepy Serpent vs Steve | 13–8 | 61.90% |
| Sleepy Serpent vs Asuka | 14–7 | 66.67% |
| Sleepy Serpent vs Hwoarang | 13–6 | 68.42% |
| Sleepy Serpent vs Jin | 11–8 | 57.89% |
| Sleepy Serpent vs Dragunov | 12–5 | 70.59% |
| Sleepy Serpent vs Yoshimitsu | 11–5 | 68.75% |
| Sleepy Serpent vs Jun | 8–8 | 50.00% |
| Sleepy Serpent vs Heihachi | 10–6 | 62.50% |
| Sleepy Serpent vs Paul | 9–5 | 64.29% |
| Sleepy Serpent vs Devil Jin | 8–6 | 57.14% |
| Sleepy Serpent vs Raven | 7–7 | 50.00% |
| Sleepy Serpent vs Lili | 9–4 | 69.23% |
| Sleepy Serpent vs Lars | 5–7 | 41.67% |
| Sleepy Serpent vs Eddy | 4–8 | 33.33% |
| Sleepy Serpent vs Clive | 7–5 | 58.33% |
| Sleepy Serpent vs Feng | 6–5 | 54.55% |
| Sleepy Serpent vs Lee | 4–5 | 44.44% |
| Sleepy Serpent vs Azucena | 4–3 | 57.14% |
| Sleepy Serpent vs Alisa | 3–3 | 50.00% |
| Sleepy Serpent vs Zafina | 5–1 | 83.33% |
| Sleepy Serpent vs Xiaoyu | 3–2 | 60.00% |
| Sleepy Serpent vs Jack-8 | 2–3 | 40.00% |
| Sleepy Serpent vs Anna | 1–4 | 20.00% |
| Sleepy Serpent vs Fahkumram | 3–2 | 60.00% |
| Sleepy Serpent vs Lidia | 1–3 | 25.00% |
| Sleepy Serpent vs Kuma | 0–3 | 0.00% |
| Sleepy Serpent vs Leroy | 2–1 | 66.67% |
| Sleepy Serpent vs Leo | 2–0 | 100.00% |
| Sleepy Serpent vs Claudio | 2–0 | 100.00% |
| Sleepy Serpent vs Nina | 0–2 | 0.00% |
| Sleepy Serpent vs Panda | 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.