| Rondeezy San vs Steve | 8–8 | 50.00% |
| Rondeezy San vs Jin | 6–6 | 50.00% |
| Rondeezy San vs Jun | 6–5 | 54.55% |
| Rondeezy San vs King | 1–9 | 10.00% |
| Rondeezy San vs Yoshimitsu | 7–2 | 77.78% |
| Rondeezy San vs Lili | 4–5 | 44.44% |
| Rondeezy San vs Law | 4–4 | 50.00% |
| Rondeezy San vs Bryan | 2–6 | 25.00% |
| Rondeezy San vs Jack-8 | 3–5 | 37.50% |
| Rondeezy San vs Alisa | 2–6 | 25.00% |
| Rondeezy San vs Nina | 3–4 | 42.86% |
| Rondeezy San vs Hwoarang | 1–4 | 20.00% |
| Rondeezy San vs Feng | 1–4 | 20.00% |
| Rondeezy San vs Reina | 1–4 | 20.00% |
| Rondeezy San vs Azucena | 3–2 | 60.00% |
| Rondeezy San vs Victor | 2–3 | 40.00% |
| Rondeezy San vs Lidia | 2–3 | 40.00% |
| Rondeezy San vs Eddy | 2–2 | 50.00% |
| Rondeezy San vs Paul | 0–3 | 0.00% |
| Rondeezy San vs Xiaoyu | 2–1 | 66.67% |
| Rondeezy San vs Dragunov | 1–2 | 33.33% |
| Rondeezy San vs Lee | 3–0 | 100.00% |
| Rondeezy San vs Leroy | 2–1 | 66.67% |
| Rondeezy San vs Clive | 1–2 | 33.33% |
| Rondeezy San vs Asuka | 0–2 | 0.00% |
| Rondeezy San vs Raven | 0–2 | 0.00% |
| Rondeezy San vs Kazuya | 1–0 | 100.00% |
| Rondeezy San vs Devil Jin | 1–0 | 100.00% |
| Rondeezy San vs Shaheen | 0–1 | 0.00% |
| Rondeezy San vs Kuma | 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.