Stadium: Court 4 Round: 54 Ground: Clay
| 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 |
| Jakarta, Singles Main, M-ITF-INA-02A | 2023/01/15 05:20 | Ega Uneputty v Markovic, Lazar | 6-4,1-6,10-3 |
| ITF - M15 Monastir | 2022/12/19 11:00 | Markovic, Lazar v Alexander Orlov | 3-6,2-6 |
| ITF - M15 Vero Beach | 2023/04/26 16:00 | Ryan Haviland v Andres Andrade | 5-7,3-6 |
| ITF - M15 Sunrise | 2023/04/13 13:00 | Tristan McCormick v Ryan Haviland | 6-3,6-3 |
| ITF - M15 Sunrise | 2023/04/11 21:30 | Juan David Velasquez v Ryan Haviland | 6-1,1-6,7-10 |
| ITF - M15 Sunrise | 2023/04/11 16:00 | Ryan Haviland v Christopher Bulus | 6-3,6-3 |
| Weston, FL, Singles M-ITF-USA-05A | 2023/02/14 16:30 | Ryan Haviland v Jiri Jenicek | 4-6,6-2,5-10 |
| Weston, FL, Singles M-ITF-USA-05A | 2023/02/13 15:00 | Arvid Nordquist v Ryan Haviland | 6-2,4-6,4-10 |
| ITF M15 Champaign | 2021/06/22 15:00 | Ryan Haviland v Olivier Stuart | 5-7,2-6 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/14 15:00 | Ryan Haviland v Tristan Schoolkate | 2-6,1-6 |