Stadium: Court 6 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Doha | 2023/01/12 13:55 | Marius Copil v Denis Klok | 6-4,1-6,6-3 |
| ITF M15 Doha | 2023/01/11 12:00 | Ivan Kremenchutskyi v Denis Klok | 2-6,1-6 |
| ITF M15 Antalya | 2022/11/22 09:20 | Savva Polukhin v Denis Klok | 6-2,6-3 |
| ITF M15 Antalya | 2022/11/16 06:30 | Denis Klok v Koray Kirci | 2-6,1-6 |
| ITF M25 Antalya | 2022/11/11 07:30 | Timo Stodder v Denis Klok | 6-3,6-1 |
| ITF M25 Antalya | 2022/11/10 09:35 | Denis Klok v Elmar Ejupovic | 6-3,6-4 |
| ITF M25 Antalya | 2022/11/09 11:00 | Denis Klok v Igor Trunov | 6-2,6-4 |
| ITF M15 Antalya | 2022/11/02 08:50 | Daniel Michalski v Denis Klok | 7-5,2-6,6-4 |
| 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 |
| ITF M15 Alkmaar | 2022/06/21 18:00 | Guy Den Heijer v Jose Fco. Vidal Azorin | 2-6,2-6 |
| UTR Pro Tennis Series Blaricum | 2022/05/08 07:30 | Guy Den Heijer v Jarno Jans | 6-4,6-3 |