Stadium: Court 4 Round: 25 Ground: Clay
| ITF M15 Antalya | 2023/12/10 07:00 | Leonardo Catani v Alexandru Cristian Dumitru | 6-3,2-6,10-6 |
| ITF M15 Antalya | 2023/12/03 07:00 | Dragos N Cazacu v Alexandru Cristian Dumitru | 6-1,6-4 |
| ITF M15 Antalya | 2023/11/26 07:00 | Dmitry Dolzhenkov v Alexandru Cristian Dumitru | 6-4,6-3 |
| ITF M15 Al Zahra | 2023/10/31 07:00 | Tanguy Genier v Alexandru Cristian Dumitru | 6-1,6-2 |
| ITF M15 Al Zahra | 2023/10/30 08:20 | Alexandru Cristian Dumitru v Lars Goran Verwerft | 6-4,1-6,13-11 |
| ITF M15 Al Zahra | 2023/10/24 07:00 | Zach Stephens v Alexandru Cristian Dumitru | 6-3,3-6,12-10 |
| ITF M15 Al Zahra | 2023/10/23 07:55 | Alexandru Cristian Dumitru v Alexey Shtengelov | 7-6,6-0 |
| ITF M15 Constanta | 2023/09/04 07:00 | Mihai Razvan Marinescu v Alexandru Cristian Dumitru | 6-1,6-2 |
| ITF M15 Bad Waltersdorf | 2023/10/01 09:00 | Manuel Lazic v Matic Dimic | 5-7,5-7 |
| ITF M15 Vienna | 2023/08/30 12:15 | Janos Fekete v Manuel Lazic | 6-3,6-2 |
| ITF M15 Kottingbrunn | 2023/08/14 08:00 | Manuel Lazic v Janos Fekete | 2-6,2-6 |
| ITF M15 Kottingbrunn | 2023/08/13 08:00 | Manuel Lazic v Filip Jeff Planinsek | 4-6,7-6,10-4 |
| ITF M25 Telfs | 2023/07/18 10:05 | Buvaysar Gadamauri v Manuel Lazic | 6-2,6-0 |
| ITF M15 Warmbad-Villach | 2023/05/21 08:00 | Filippo Speziali v Manuel Lazic | 6-3,6-1 |
| ITF M15 Warmbad-Villach | 2023/05/21 07:00 | Aldin Jasarevic v Manuel Lazic | 1-6,0-6 |
| Challenger Mauthausen | 2023/05/07 11:20 | Manuel Lazic v Marius Copil | 3-6,0-6 |