Stadium: Court 2 Round: 25 Ground: Clay
| ITF M25 Dubrovnik | 2023/04/05 07:00 | Nikola Basic v Sebastian Gima | 0-6,1-6 |
| ITF M25 Dubrovnik | 2023/04/04 08:30 | Nikola Basic v Miha Vetrih | 6-4,6-0 |
| ITF M25 Dubrovnik | 2023/04/03 10:25 | Nikola Basic v Lovro Maricic | 6-0,6-1 |
| UTR Pro Zadar | 2023/04/01 11:00 | Duje Kekez v Nikola Basic | 6-3,6-2 |
| UTR Pro Zadar | 2023/03/31 06:00 | Tim Heger v Nikola Basic | 6-4,6-2 |
| UTR Pro Zadar | 2023/03/30 07:30 | Sebastian Prechtel v Nikola Basic | 2-6,6-3,7-5 |
| UTR Pro Zadar | 2023/03/28 09:00 | Paul Woerner v Nikola Basic | 6-7,4-6 |
| Challenger Zadar | 2023/03/19 11:40 | Nikola Basic v Damien Wenger | 3-6,1-6 |
| ITF M15 Monastir | 2023/03/22 08:30 | Olaf Pieczkowski v Buvaysar Gadamauri | 2-6,6-3,2-6 |
| ITF M15 Monastir | 2023/03/19 08:30 | Olaf Pieczkowski v Lorenzo Rottoli | 6-7,3-6 |
| ITF M15 Monastir | 2023/03/18 10:15 | Simone Roncalli v Olaf Pieczkowski | 2-6,2-6 |
| ITF M15 Monastir | 2023/03/17 11:00 | Olaf Pieczkowski v Szymon Kielan | 6-1,6-1 |
| ITF M15 Monastir | 2023/03/16 08:30 | Olaf Pieczkowski v Luigi Sorrentino | 6-3,6-4 |
| ITF M15 Monastir | 2023/03/14 11:40 | Alexis Boureau v Olaf Pieczkowski | 2-6,1-6 |
| ITF M15 Monastir | 2023/03/07 10:30 | Olaf Pieczkowski v Stefano Napolitano | 4-6,3-6 |
| ITF M15 Monastir | 2023/02/12 08:30 | Ryan Nijboer v Olaf Pieczkowski | 7-6,6-2 |