| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2018/2019 | Serie A Women | 22 | 1845 | 4 | 0 | 0.2 | — |
| 2019/2020 | Serie A Women | 2 | 34 | 1 | 0 | — | — |
| 2020/2021 | Serie A Women | 13 | 709 | 0 | 1 | 0.13 | — |
| 2021/2022 | Serie A Women | 20 | 1719 | 1 | 1 | 0.1 | — |
| 2022/2023 | Serie A Women | 21 | 1365 | 0 | 1 | 0.07 | 6.43 |
| 2023/2024 | Serie A Women | 22 | 1740 | 0 | 2 | 0.1 | 6.93 |
| 2024/2025 | Serie A Women | 20 | 1247 | 0 | 0 | 0 | 6.78 |
| 2025/2026 | Serie A Women | 8 | 359 | 0 | 0 | 0 | 6.29 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-29
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Inter Milano W | 10 | 4 | 0 | 6 | 0 | 0 | 1 | 0 |
 Juventus W | 9 | 2 | 1 | 6 | 0 | 0 | 2 | 0 |
 AC Milan W | 7 | 1 | 4 | 2 | 0 | 0 | 1 | 0 |
 Roma W | 6 | 0 | 2 | 4 | 0 | 0 | 1 | 0 |
 Napoli W | 6 | 2 | 2 | 2 | 0 | 0 | 3 | 0 |
 Sassuolo W | 5 | 2 | 2 | 1 | 0 | 0 | 0 | 0 |
 Sampdoria W | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 0 |
 Lazio W | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 FC Como W | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Wolfsburg W | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Fiorentina W | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Empoli W | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Pomigliano W | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Parma W | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Brondby W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Atalanta W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Bari W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Verona W | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 |
 Chievo Verona W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Florentia W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Australia W | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Germany W | 2 | 0 | 0 | 2 | 0 | 0 | 1 | 0 |
 France W | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Faroe Islands W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Kazakhstan W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Iceland W | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
 Belgium W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Russia W | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
 Netherlands W | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
 Austria W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Scotland W | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Belarus W | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Croatia W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Wales W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Romania W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Estonia W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 FYR Macedonia W | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 |
 Greece W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Turkey W | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
Neither a goal nor an assist came from Kaja Erzen's 8 Serie A Women appearances in 2025/2026 (359 minutes). That season graded out at an average match rating of 6.29.
His league record spans 8 seasons (2018–2025) across 5 clubs. His best-rated season remains 2023/2024 (6.93, Serie A Women); his lowest was 2025/2026 (6.29).
