| UTR Pro Beograd | 2023/10/10 10:01 | Marko Nikolic v Obrad Markovski | 7-6,6-4 |
| UTR Pro Beograd | 2023/10/09 06:00 | Marko Nikolic v Illya Beloborodko | 6-7,6-7 |
| ITF M15 Kursumlijska Banja | 2023/09/19 08:45 | Marko Nikolic v Ioannis Kountourakis | 4-6,4-6 |
| ITF M15 Kursumlijska Banja | 2023/09/18 07:00 | Obrad Markovski v Marko Nikolic | 1-6,7-5,8-10 |
| ITF M15 Kursumlijska Banja | 2023/09/17 10:30 | Marko Nikolic v Marko Maric | 6-3,3-6,10-3 |
| ITF M15 Kursumlijska Banja | 2023/09/12 07:00 | Marko Nikolic v Zoran Ludoski | 3-6,1-6 |
| ITF M15 Kursumlijska Banja | 2023/09/11 07:00 | Alexander Chepik v Marko Nikolic | 3-6,7-6,2-10 |
| ITF M15 Pirot | 2023/09/06 11:00 | Marko Nikolic v Antonio Massara | 3-6,2-6 |
| UTR Pro Beograd | 2023/10/10 10:30 | Illya Beloborodko v Aleksa Mardjonovic | 2-6,3-6 |
| UTR Pro Beograd | 2023/10/08 12:46 | Aleksa Mardjonovic v Obrad Markovski | 2-6,3-6 |
| UTR Pro Beograd | 2023/10/06 07:30 | Aleksa Mardjonovic v Drazen Petrovic | 4-6,6-3,2-6 |
| UTR Pro Beograd | 2023/10/04 06:00 | Enrique Bogo v Aleksa Mardjonovic | 4-6,6-3,6-4 |
| UTR Pro Beograd | 2023/10/03 09:33 | Domagoj Biljesko v Aleksa Mardjonovic | 6-0,4-6,6-2 |
| UTR Pro Beograd | 2023/10/02 08:01 | Zekai Li v Aleksa Mardjonovic | 3-6,2-6 |
| ITF M15 Pirot | 2023/09/05 07:30 | Aleksa Mardjonovic v Francesco Ferrari | 7-6,4-6,6-10 |
| ITF M15 Pirot | 2023/09/04 08:30 | Aleksa Mardjonovic v Jacques-Kai Inoue | 6-3,7-5 |