Stadium: Court 6 Round: 26 Ground: Clay
| ITF M25 - Pardubice | 2021/09/22 08:00 | Alexander Weis v Mikalai Haliak | 7-6,6-4 |
| ITF M25 - Santa Margherita | 2023/04/18 10:00 | Mikalai Haliak v Niccolo Ciavarella | 6-1,6-7,6-2 |
| ITF M25 - Santa Margherita | 2023/04/11 12:45 | Mateo Nicolas Martinez v Mikalai Haliak | 6-4,6-1 |
| ITF M25 - Santa Margherita | 2023/04/10 11:20 | Mikalai Haliak v Andrea Gola | 6-2,6-3 |
| ITF M25 - Santa Margherita | 2023/04/09 08:30 | Mikalai Haliak v Stephanos Schinas | 7-5,6-3 |
| Challenger - St Brieuc | 2023/03/19 12:00 | Albano Olivetti v Mikalai Haliak | 2-6,7-6,7-6 |
| ITF M15 - Poitiers | 2023/03/17 12:00 | Antoine Hoang v Mikalai Haliak | 7-6,6-4 |
| ITF M15 - Poitiers | 2023/03/16 16:00 | Mikalai Haliak v Harry Wendelken | 7-6,7-6 |
| ITF M15 - Creteil | 2023/03/07 09:20 | Mikalai Haliak v Antoine Ghibaudo | 1-6,6-7 |
| ITF M25 - Santa Margherita | 2023/04/18 11:45 | Jakub Wojcik v Alexander Weis | 4-6,4-6 |
| ITF M25 - Santa Margherita | 2023/04/12 10:15 | Alexander Weis v Giorgio Tabacco | 6-2,4-6,6-7 |
| ITF M25 - Santa Margherita | 2023/04/10 14:00 | Alexander Weis v Fabrizio Andaloro | 6-3,6-4 |
| Challenger - Girona | 2023/03/26 08:30 | Alexander Weis v Abedallah Shelbayh | 7-6,3-6,6-7 |
| ITF M25 - Palmanova | 2023/03/24 11:40 | Hernan Casanova v Alexander Weis | 3-6,6-1,6-4 |
| ITF M25 - Palmanova | 2023/03/23 13:30 | Felix Gill v Alexander Weis | 5-7,0-6 |
| ITF M25 - Palmanova | 2023/03/22 08:00 | Jaime Caldes v Alexander Weis | 3-6,6-2,2-6 |
| ITF M25 - Palmanova | 2023/03/14 12:00 | Kyrian Jacquet v Alexander Weis | 7-6,6-7,7-6 |