Ground: Hardcourt outdoor
| ITF M25 Jablonec Nad Nisou | 2023/05/29 10:30 | Lukas Janousek v Filip Apltauer | 7-5,2-6,12-10 |
| ITF M25 Jablonec Nad Nisou | 2023/05/28 10:30 | Victor Sklenka v Filip Apltauer | 2-6,4-6 |
| ITF M25 Prague | 2023/05/17 11:10 | Goncalo Oliveira v Filip Apltauer | 6-4,6-2 |
| ITF M25 Prague | 2023/05/16 07:55 | Illya Beloborodko v Filip Apltauer | 2-6,6-3,6-10 |
| ITF M25 Prague | 2023/05/14 08:30 | Ondrej Hujo v Filip Apltauer | 3-6,5-7 |
| ITF M15 Kish Island | 2023/03/17 09:50 | S D Prajwal Dev v Filip Apltauer | 7-6,4-6,6-3 |
| ITF M15 Kish Island | 2023/03/16 06:30 | Filip Apltauer v Sina Moghimi | 6-4,6-4 |
| ITF M15 Kish Island | 2023/03/14 11:05 | Filip Apltauer v Vladislav Ivanov | 3-6,7-5,6-3 |
| Challenger Palmas del Mar | 2023/06/11 22:50 | Bernard Tomic v Donald Young | 6-4,6-2 |
| Challenger Little Rock | 2023/05/28 21:00 | Donald Young v Mukund Sasikumar | 1-6,4-6 |
| Challenger Savannah | 2023/04/23 21:40 | Elmar Ejupovic v Donald Young | 4-6,6-4,6-2 |
| Challenger Tallahassee | 2023/04/17 17:25 | Patrick Kypson v Donald Young | 6-0,6-2 |
| Challenger Tallahassee | 2023/04/16 17:00 | Donald Young v Aidan Mayo | 6-4,2-6,6-4 |
| Challenger Sarasota | 2023/04/10 17:10 | Zachary Svajda v Donald Young | 7-5,1-6,6-1 |
| Challenger Rome GA | 2023/02/20 17:30 | Keegan Smith v Donald Young | 6-4,6-3 |
| Challenger Rome GA | 2023/02/19 19:25 | Donald Young v Kiranpal Pannu | 5-7,6-2,6-2 |