| Irelia vs Kazuya | 23–35 | 39.66% |
| Irelia vs Jin | 19–32 | 37.25% |
| Irelia vs Steve | 15–28 | 34.88% |
| Irelia vs Reina | 9–23 | 28.12% |
| Irelia vs Lili | 21–9 | 70.00% |
| Irelia vs Paul | 8–19 | 29.63% |
| Irelia vs Dragunov | 10–17 | 37.04% |
| Irelia vs Lars | 11–13 | 45.83% |
| Irelia vs Azucena | 11–13 | 45.83% |
| Irelia vs Asuka | 6–17 | 26.09% |
| Irelia vs Bryan | 10–11 | 47.62% |
| Irelia vs Heihachi | 6–14 | 30.00% |
| Irelia vs Law | 6–13 | 31.58% |
| Irelia vs Anna | 3–15 | 16.67% |
| Irelia vs King | 9–8 | 52.94% |
| Irelia vs Jun | 7–10 | 41.18% |
| Irelia vs Yoshimitsu | 7–9 | 43.75% |
| Irelia vs Xiaoyu | 4–10 | 28.57% |
| Irelia vs Feng | 4–10 | 28.57% |
| Irelia vs Hwoarang | 5–7 | 41.67% |
| Irelia vs Lee | 5–6 | 45.45% |
| Irelia vs Eddy | 3–8 | 27.27% |
| Irelia vs Victor | 5–5 | 50.00% |
| Irelia vs Leo | 4–5 | 44.44% |
| Irelia vs Lidia | 2–6 | 25.00% |
| Irelia vs Jack-8 | 4–3 | 57.14% |
| Irelia vs Nina | 0–7 | 0.00% |
| Irelia vs Devil Jin | 2–3 | 40.00% |
| Irelia vs Shaheen | 3–2 | 60.00% |
| Irelia vs Kuma | 3–2 | 60.00% |
| Irelia vs Leroy | 1–4 | 20.00% |
| Irelia vs Alisa | 2–2 | 50.00% |
| Irelia vs Zafina | 1–3 | 25.00% |
| Irelia vs Claudio | 2–1 | 66.67% |
| Irelia vs Raven | 1–2 | 33.33% |
| Irelia vs Clive | 0–3 | 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.