Stadion: Court 11 Round: 54 Ground: Hardcourt outdoor
| ITF - M15 - Tacarigua | 2023/04/19 18:00 | Leo Vithoontien v Maxence Broville | 3-6,5-7 |
| ITF - M15 - Tacarigua | 2023/04/17 18:00 | Miles Jones v Leo Vithoontien | 5-7,4-6 |
| ITF - M15 - Tacarigua | 2023/04/16 18:00 | Rodrigo Reyna v Leo Vithoontien | 2-6,0-6 |
| ITF - M15 - Sunrise | 2023/04/13 13:00 | Leo Vithoontien v Cooper Williams | 3-6,4-6 |
| ITF - M15 - Sunrise | 2023/04/11 21:30 | Herbert Jody Maginley v Leo Vithoontien | 6-2,4-6,4-10 |
| ITF - M15 - Sunrise | 2023/04/11 16:00 | Alex Sklizovic v Leo Vithoontien | 2-6,4-6 |
| ITF - M25 - Tsukuba | 2023/03/27 02:00 | Jeremy Jin v Leo Vithoontien | 1-6,6-1,10-6 |
| ITF - M15 - Naples | 2023/02/20 14:30 | Lucas Bouquet v Leo Vithoontien | 6-2,6-0 |
| ITF - M15 - Tacarigua | 2023/04/23 20:30 | Maxwell Weishan v Lazar Markovic | 3-6,1-6 |
| ITF - M15 - Sharm El Sheikh | 2023/03/26 08:00 | Lazar Markovic v Karim Ibrahim | 5-7,5-7 |
| ITF - M25 - Palmanova | 2023/03/20 14:00 | Lazar Markovic v Peetu Pohjola | 6-7,1-6 |
| ITF - M25 - Palmanova | 2023/03/12 12:00 | Lazar Markovic v Marcel Politowicz | 5-7,2-6 |
| ITF - M15 - Jakarta - Qualifikation | 2023/01/22 02:30 | Sam Ryan Ziegann v Lazar Markovic | 6-1,6-4 |
| ITF - M15 - Jakarta | 2023/01/15 05:20 | Ega Uneputty v Lazar Markovic | 6-4,1-6,10-3 |
| ITF - M15 - Monastir | 2022/12/19 11:00 | Lazar Markovic v Alexander Orlov | 3-6,2-6 |
| ITF - M15 - Monastir | 2022/12/18 10:00 | Lazar Markovic v Christopher Chien | 6-4,6-3 |