| KPKostas vs Hwoarang | 13–8 | 61.90% |
| KPKostas vs Kazuya | 11–5 | 68.75% |
| KPKostas vs Reina | 13–3 | 81.25% |
| KPKostas vs Lili | 12–2 | 85.71% |
| KPKostas vs Eddy | 5–9 | 35.71% |
| KPKostas vs King | 4–8 | 33.33% |
| KPKostas vs Jin | 6–4 | 60.00% |
| KPKostas vs Kuma | 4–3 | 57.14% |
| KPKostas vs Leroy | 4–3 | 57.14% |
| KPKostas vs Yoshimitsu | 2–4 | 33.33% |
| KPKostas vs Steve | 3–3 | 50.00% |
| KPKostas vs Law | 5–0 | 100.00% |
| KPKostas vs Devil Jin | 4–1 | 80.00% |
| KPKostas vs Nina | 3–2 | 60.00% |
| KPKostas vs Lee | 2–3 | 40.00% |
| KPKostas vs Xiaoyu | 3–1 | 75.00% |
| KPKostas vs Claudio | 2–2 | 50.00% |
| KPKostas vs Victor | 0–4 | 0.00% |
| KPKostas vs Paul | 1–2 | 33.33% |
| KPKostas vs Bryan | 0–3 | 0.00% |
| KPKostas vs Feng | 1–2 | 33.33% |
| KPKostas vs Leo | 1–2 | 33.33% |
| KPKostas vs Lars | 2–1 | 66.67% |
| KPKostas vs Zafina | 3–0 | 100.00% |
| KPKostas vs Jun | 2–1 | 66.67% |
| KPKostas vs Raven | 0–3 | 0.00% |
| KPKostas vs Asuka | 1–1 | 50.00% |
| KPKostas vs Alisa | 2–0 | 100.00% |
| KPKostas vs Azucena | 0–2 | 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.