Stadium: Court 4 Round: 54 Ground: Clay
| ITF - M15 Addis Ababa | 2023/05/14 07:00 | Denis Constantin Spiridon v Patrick Toman | 6-0,6-0 |
| ITF - M15 Monastir | 2023/03/27 08:30 | Alexandre Reco v Denis Constantin Spiridon | 5-7,6-1,10-3 |
| ITF - M15 Antalya | 2023/03/07 07:00 | Denis Constantin Spiridon v Matteo De Vincentis | 5-7,0-6 |
| ITF - M15 Antalya | 2023/03/06 08:50 | Denis Constantin Spiridon v Mirko Lagasio | 6-4,7-6 |
| ITF - M15 Antalya | 2023/03/05 06:30 | Florig, Philip v Denis Constantin Spiridon | 3-6,6-7 |
| ITF - M15 Antalya | 2023/02/28 07:00 | Andrea Bacaloni v Denis Constantin Spiridon | 4-6,6-1,10-6 |
| ITF - M15 Antalya | 2023/02/27 08:20 | White, Joseph v Denis Constantin Spiridon | 5-7,3-6 |
| ITF - M15 Antalya | 2023/02/26 07:00 | Donmezer, Enes v Denis Constantin Spiridon | 3-6,0-6 |
| ITF - M15 Addis Ababa | 2023/05/14 07:00 | Markovic, Lazar v Alexey Dubinin | 7-6,6-4 |
| ITF - M15 Orange Park | 2023/05/01 14:00 | Markovic, Lazar v Ryan Haviland | 6-7,3-6 |
| ITF M15 Tacarigua | 2023/04/24 18:00 | Leo Vithoontien v Markovic, Lazar | 6-1,6-1 |
| ITF M15 Tacarigua | 2023/04/23 20:30 | Maxwell Weishan v Markovic, Lazar | 3-6,1-6 |
| ITF - M15 Sharm El Sheikh | 2023/03/26 08:00 | Markovic, Lazar v Karim Ibrahim | 5-7,5-7 |
| ITF M25 Palmanova | 2023/03/20 14:00 | Markovic, Lazar v Peetu Pohjola | 6-7,1-6 |
| ITF M25 Palmanova | 2023/03/12 12:00 | Markovic, Lazar v Marcel Politowicz | 5-7,2-6 |
| ITF M15 Jakarta Qual | 2023/01/22 02:30 | Sam Ryan Ziegann v Markovic, Lazar | 6-1,6-4 |