| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2019/2020 | Superliga (Denmark) | 14 | 489 | 0 | 0 | 0 | 6.66 |
| 2020/2021 | Superliga (Denmark) | 22 | 688 | 1 | 1 | 0.26 | 6.77 |
| 2021/2022 | Superliga (Denmark) | 30 | 1952 | 5 | 5 | 0.46 | 7.07 |
| 2022/2023 | Superliga (Denmark) | 32 | 2535 | 18 | 5 | 0.82 | 7.45 |
| 2023/2024 | Superliga (Denmark) | 2 | 159 | 0 | 0 | 0 | 6.99 |
| 2023/2024 | Serie A | 28 | 1072 | 3 | 1 | 0.34 | 6.9 |
| 2024/2025 | Serie A | 37 | 2227 | 4 | 2 | 0.24 | 6.96 |
| 2025/2026 | Serie A | 30 | 1600 | 5 | 1 | 0.34 | 6.79 |
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 2026-07-28
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Brøndby IF | 12 | 7 | 1 | 4 | 2 | 1 | 1 | 0 |
 Randers FC | 12 | 8 | 4 | 0 | 2 | 0 | 0 | 0 |
 FC København | 11 | 4 | 4 | 3 | 0 | 0 | 0 | 0 |
 Silkeborg IF | 11 | 8 | 2 | 1 | 7 | 1 | 1 | 0 |
 Aalborg BK | 10 | 5 | 3 | 2 | 3 | 1 | 2 | 0 |
 Atalanta | 9 | 2 | 4 | 3 | 1 | 0 | 0 | 0 |
 Juventus | 8 | 3 | 2 | 3 | 1 | 0 | 0 | 0 |
 Odense BK | 8 | 4 | 2 | 2 | 2 | 1 | 1 | 0 |
 AC Milan | 7 | 3 | 1 | 3 | 1 | 0 | 0 | 0 |
 Napoli | 7 | 4 | 2 | 1 | 2 | 0 | 0 | 0 |
 Lyngby Boldklub | 7 | 3 | 1 | 3 | 0 | 0 | 2 | 1 |
 AGF | 7 | 4 | 0 | 3 | 0 | 1 | 0 | 0 |
 Bologna | 7 | 2 | 2 | 3 | 2 | 1 | 1 | 0 |
 Roma | 6 | 1 | 2 | 3 | 0 | 0 | 1 | 0 |
 Genoa | 6 | 5 | 0 | 1 | 0 | 1 | 0 | 0 |
 Fiorentina | 6 | 1 | 1 | 4 | 0 | 0 | 1 | 0 |
 Sønderjyske Fodbold | 6 | 4 | 0 | 2 | 0 | 0 | 0 | 0 |
 Cagliari | 6 | 5 | 1 | 0 | 1 | 0 | 0 | 0 |
 Torino | 6 | 3 | 1 | 2 | 0 | 1 | 1 | 0 |
 Nordsjælland | 6 | 2 | 3 | 1 | 1 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Switzerland | 3 | 1 | 2 | 0 | 1 | 0 | 0 | 0 |
 Belarus | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 0 |
 Portugal | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Spain | 2 | 0 | 0 | 2 | 1 | 0 | 1 | 0 |
 Serbia | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Greece | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 North Macedonia | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 |
 Northern Ireland | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
 Scotland | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Czech Republic | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Faroe Islands | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Finland U19 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
 Lithuania | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 North. Ireland U21 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Germany U21 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Romania U21 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Russia U21 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Finland U21 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Iceland U21 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
 France U17 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 |
The 2025/2026 Serie A line for Gustav Isaksen: 30 appearances (1,600 minutes), 5 goals, 1 assist — 0.34 goal involvements per 90. That season graded out at an average match rating of 6.79.
2022/2023 stands as his highest-rated season (7.45, Superliga (Denmark)), with 2019/2020 the weakest (6.66).
