| Kostelones vs King | 13–10 | 56.52% |
| Kostelones vs Eddy | 13–8 | 61.90% |
| Kostelones vs Armor King | 13–7 | 65.00% |
| Kostelones vs Law | 3–14 | 17.65% |
| Kostelones vs Dragunov | 10–4 | 71.43% |
| Kostelones vs Miary Zo | 8–6 | 57.14% |
| Kostelones vs Reina | 9–3 | 75.00% |
| Kostelones vs Asuka | 7–3 | 70.00% |
| Kostelones vs Azucena | 6–4 | 60.00% |
| Kostelones vs Jin | 4–4 | 50.00% |
| Kostelones vs Lili | 4–4 | 50.00% |
| Kostelones vs Clive | 5–3 | 62.50% |
| Kostelones vs Jun | 5–2 | 71.43% |
| Kostelones vs Steve | 3–3 | 50.00% |
| Kostelones vs Victor | 4–2 | 66.67% |
| Kostelones vs Yoshimitsu | 3–1 | 75.00% |
| Kostelones vs Hwoarang | 2–2 | 50.00% |
| Kostelones vs Devil Jin | 3–1 | 75.00% |
| Kostelones vs Kazuya | 1–2 | 33.33% |
| Kostelones vs Leo | 2–1 | 66.67% |
| Kostelones vs Claudio | 2–1 | 66.67% |
| Kostelones vs Lee | 1–2 | 33.33% |
| Kostelones vs Zafina | 1–2 | 33.33% |
| Kostelones vs Raven | 1–2 | 33.33% |
| Kostelones vs Paul | 2–0 | 100.00% |
| Kostelones vs Bryan | 0–2 | 0.00% |
| Kostelones vs Lidia | 2–0 | 100.00% |
| Kostelones vs Anna | 0–2 | 0.00% |
| Kostelones vs Fahkumram | 0–2 | 0.00% |
| Kostelones vs Xiaoyu | 0–1 | 0.00% |
| Kostelones vs Feng | 0–1 | 0.00% |
| Kostelones vs Heihachi | 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.