Stadium: Court 10 Round: 54 Ground: Clay
| ITF M25 Alkmaar | 2021/06/20 14:00 | Vladimir Ivanov v Jack Gibbens | 6-2,7-5 |
| ITF M15 Helsinki | 2021/06/02 06:30 | Lucas Catarina v Vladimir Ivanov | 7-5,1-6,6-2 |
| ITF M15 Kouvola | 2021/05/26 08:00 | Vladimir Ivanov v Lorenzo Rottoli | 2-6,4-6 |
| ITF M15 Antalya | 2021/05/19 11:10 | Vladimir Ivanov v Edoardo Eremin | 3-6,4-6 |
| ITF M15 Antalya | 2021/05/13 11:40 | Alexander Erler v Vladimir Ivanov | 5-7,6-3,6-1 |
| ITF M15 Antalya | 2021/05/12 11:30 | Vladimir Ivanov v Adrian Mateo Bejenaru | 6-3,7-6 |
| ITF M15 Antalya | 2021/05/11 07:00 | Vladimir Ivanov v Alafia Ayeni | 7-6,7-5 |
| ITF M15 Antalya | 2021/05/10 07:00 | Vladimir Ivanov v Mark Tryakshin | 0-6,6-4,10-4 |
| ITF M25 Alkmaar | 2021/06/20 17:00 | Alec Deckers v Guy Den Heijer | 3-6,7-6,4-10 |
| ITF M25 Vic | 2021/05/16 08:00 | Mateus Alves v Guy Den Heijer | 6-2,6-3 |
| ITF M15 Valldoreix | 2021/05/09 13:00 | Guy Den Heijer v Pol Amoros Ramos | 3-6,2-6 |
| ITF M15 Majadahonda | 2021/05/02 16:15 | Taiyo Yamanaka v Guy Den Heijer | 6-7,6-3,11-9 |
| ITF M15 Antalya | 2021/03/25 07:00 | Guy Den Heijer v Juan Pablo Paz | 1-6,2-6 |
| ITF M15 Antalya | 2021/03/24 06:30 | Guy Den Heijer v Carlo Alberto Fossati | 6-2,6-3 |
| ITF M15 Antalya | 2021/03/22 07:00 | Guy Den Heijer v Vladislav Gorbatenko | 7-5,6-0 |
| ITF M15 Antalya | 2021/03/21 07:00 | Guy Den Heijer v Alexander Ovcharov | 6-1,6-2 |