| ITF M15 Frankfurt Am Main | 2023/08/07 13:00 | Facundo Yunis v Filip Apltauer | 6-1,6-2 |
| ITF M15 Frankfurt Am Main | 2023/08/07 08:00 | Ammar Elamin v Filip Apltauer | 0-6,3-6 |
| ITF M15 Hyvinkää | 2023/08/03 08:30 | Filip Apltauer v Massimo Giunta | 6-7,4-6 |
| ITF M15 Hyvinkää | 2023/08/01 07:00 | Johannes Seeman v Filip Apltauer | 4-6,5-7 |
| ITF M15 Hyvinkää | 2023/07/31 09:30 | Oskari Eerola v Filip Apltauer | 4-6,3-6 |
| ITF M15 Uslar | 2023/07/19 11:35 | Filip Apltauer v Jakub Nicod | 2-6,6-4,3-6 |
| ITF M15 Uslar | 2023/07/17 14:30 | Filip Apltauer v Mariano Dedura-Palomero | 6-3,6-4 |
| ITF M25 Kassel | 2023/07/11 11:10 | Martin Benes v Filip Apltauer | 5-7,6-2,10-7 |
| Challenger de Cary | 2023/08/06 18:30 | Billy Harris v Donald Young | 6-4,6-4 |
| ATP Washington | 2023/07/29 14:00 | Sho Shimabukuro v Donald Young | 6-3,6-4 |
| ATP Atlanta | 2023/07/22 19:40 | Donald Young v Lloyd Harris | 1-6,2-6 |
| ATP Newport | 2023/07/16 16:00 | Donald Young v Illya Marchenko | 1-6,3-6 |
| Challenger de Palmas del Mar | 2023/06/11 22:50 | Bernard Tomic v Donald Young | 6-4,6-2 |
| Challenger de Little Rock | 2023/05/28 21:00 | Donald Young v Mukund Sasikumar | 1-6,4-6 |
| Challenger de Savannah | 2023/04/23 21:40 | Elmar Ejupovic v Donald Young | 4-6,6-4,6-2 |
| Challenger de Tallahassee | 2023/04/17 17:25 | Patrick Kypson v Donald Young | 6-0,6-2 |