Stadium: Court 1 Round: 26 Ground: Clay
| ITF M25 Loule | 2023/02/26 10:00 | Timofey Stepanov v Guy Den Heijer | 6-4,6-2 |
| ITF M25 Faro | 2023/02/21 10:00 | Francois Musitelli v Guy Den Heijer | 6-7,7-6,12-10 |
| ITF M25 Faro | 2023/02/20 10:00 | Guy Den Heijer v Ryotaro Matsumura | 6-4,4-6,10-3 |
| ITF M25 Faro | 2023/02/19 10:00 | Guy Den Heijer v Stepan Pecak | 6-3,6-7,12-10 |
| 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 |
| UTR Pro Zadar | 2023/03/04 08:30 | David Pichler v Davide Galoppini | 6-1,3-6,2-5 |
| UTR Pro Zadar | 2023/03/03 09:30 | David Pichler v Milan Drinic | 6-4,7-5 |
| UTR Pro Zadar | 2023/03/02 11:00 | David Pichler v Josip Simundza | 6-4,6-2 |
| UTR Pro Zadar | 2023/02/28 10:46 | David Pichler v Alessandro Ingarao | 6-0,6-4 |
| UTR Pro Zadar | 2023/02/28 07:00 | Radomir Tomic v David Pichler | 0-6,2-6 |
| ITF M15 Oberhaching | 2023/02/14 11:00 | David Pichler v Giovanni Oradini | 3-6,3-6 |
| ITF M15 Sharm El Sheikh | 2023/02/08 13:55 | David Pichler v Luca Fantini | 6-7,6-4,3-6 |
| UTR Pro Dubai | 2023/02/04 06:36 | David Pichler v Igor Sijsling | 1-6,3-6 |