Stadium: Court 7 Round: 54 Ground: Clay
| ITF M25 Al Zahra | 2023/01/25 13:20 | Guy Den Heijer v Prajnesh Gunneswaran | 1-6,6-7 |
| ITF M25 Doha | 2023/01/16 12:00 | Denis Klok v Guy Den Heijer | 6-2,3-6,10-5 |
| ITF M25 Doha | 2023/01/15 14:15 | Adel Ghanim v Guy Den Heijer | 0-6,1-6 |
| ITF M15 Doha | 2023/01/12 13:15 | Guy Den Heijer v Kristjan Tamm | 4-6,6-7 |
| ITF M15 Doha | 2023/01/11 12:00 | Samir Hamza Reguig v Guy Den Heijer | 3-6,1-6 |
| ITF M15 Doha | 2023/01/10 12:00 | Guy Den Heijer v Arslanbek Aitkulov | 6-2,7-5 |
| ITF M25 Oldenzaal | 2022/08/25 16:55 | Max Houkes v Guy Den Heijer | 6-1,6-3 |
| ITF M25 Oldenzaal | 2022/08/24 11:50 | Thijmen Loof v Guy Den Heijer | 3-6,5-7 |