| Australia Friendlies | 2021/01/29 07:30 | Dandenong Thunder U21 v Heidelberg Utd U21 | W | 5-2 |
| Australia Victoria U21 League | 2021/04/24 02:30 | Avondale U21 v Dandenong Thunder U21 | L | 6-3 |
| Australia Victoria U21 League | 2021/04/17 07:00 | Dandenong Thunder U21 v Hume City U21 | L | 1-2 |
| Australia Victoria U21 League | 2021/04/10 07:00 | Dandenong Thunder U21 v St Albans Saints U21 | L | 1-2 |
| Australia Victoria U21 League | 2021/04/03 01:30 | South Melbourne U21 v Dandenong Thunder U21 | D | 4-4 |
| Australia Victoria U21 League | 2021/03/27 06:00 | Dandenong Thunder U21 v Port Melbourne U21 | L | 3-4 |
| Australia Victoria U21 League | 2021/03/20 02:00 | Eastern Lions U21 v Dandenong Thunder U21 | D | 1-1 |
| Australia Victoria U21 League | 2021/03/12 07:30 | Dandenong Thunder U21 v Bentleigh Greens U21 | L | 1-3 |
| Australia Victoria U21 League | 2021/03/07 04:00 | Melbourne Knights U21 v Dandenong Thunder U21 | W | 2-4 |
| Australia Victoria U21 League | 2021/04/24 03:00 | Heidelberg Utd U21 v Port Melbourne U21 | L | 1-2 |
| Australia Victoria U21 League | 2021/04/17 02:30 | Eastern Lions U21 v Heidelberg Utd U21 | W | 1-4 |
| Australia Victoria U21 League | 2021/04/11 05:00 | Bentleigh Greens U21 v Heidelberg Utd U21 | W | 0-2 |
| Australia Victoria U21 League | 2021/04/03 04:00 | Melbourne Knights U21 v Heidelberg Utd U21 | L | 1-0 |
| Australia Victoria U21 League | 2021/03/28 02:30 | Heidelberg Utd U21 v Dandenong City U21 | W | 1-0 |
| Australia Victoria U21 League | 2021/03/20 04:00 | Green Gully U21 v Heidelberg Utd U21 | L | 6-1 |
| Australia Victoria U21 League | 2021/03/13 05:30 | Altona Magic U21 v Heidelberg Utd U21 | L | 3-1 |
| Australia Victoria U21 League | 2021/03/05 07:15 | Oakleigh Cannons U21 v Heidelberg Utd U21 | L | 4-0 |