Stadium: Court 2 Round: 26 Ground: Clay
| ITF M25 - Risskov/Århus | 2023/06/14 08:30 | Max Houkes v Jack Karlsson Winstrand | 7-5,6-2 |
| Challenger Skopje | 2023/05/24 09:00 | Max Houkes v Oliver Crawford | 4-6,2-6 |
| Challenger Skopje | 2023/05/22 15:10 | Kacper Zuk v Max Houkes | 1-6,1-6 |
| Challenger Tunis | 2023/05/16 08:30 | Sho Shimabukuro v Max Houkes | 6-1,3-6,6-1 |
| Challenger Tunis | 2023/05/14 13:50 | Rayen Hermassi v Max Houkes | 2-6,0-6 |
| Challenger Prag | 2023/05/01 11:05 | Max Houkes v Vitaliy Sachko | 6-4,4-6,5-7 |
| Challenger Prag | 2023/04/30 12:30 | Shintaro Mochizuki v Max Houkes | 6-7,3-6 |
| Challenger Rom | 2023/04/28 09:30 | Sumit Nagal v Max Houkes | 7-5,6-0 |
| ITF M25 - Risskov/Århus | 2023/06/14 10:40 | Olle Wallin v Jonas P Hartenstein | 2-6,4-6 |
| ITF M25 - Jablonec Nad Nisou | 2023/05/30 10:15 | Peter Goldsteiner v Jonas P Hartenstein | 7-5,7-5 |
| ITF M25 - Jablonec Nad Nisou | 2023/05/29 09:00 | Patrik Oplustil v Jonas P Hartenstein | 3-6,0-6 |
| ITF M25 - Jablonec Nad Nisou | 2023/05/28 13:00 | Mikolaj Lis v Jonas P Hartenstein | 1-6,2-6 |
| ITF M25 - Prag | 2023/05/15 10:45 | Tommy Czaplinski v Jonas P Hartenstein | 2-6,1-6 |
| ITF M15 - Orange Park | 2023/05/02 14:00 | Jonas P Hartenstein v Jelani Sarr | 4-6,7-5,2-10 |
| ITF M15 - Boca Raton | 2022/11/15 14:00 | Jonas P Hartenstein v Martin Katz | 5-7,3-6 |
| ITF M15 - Boca Raton | 2022/11/14 14:00 | Jonas P Hartenstein v Liam Puttergill | 6-0,6-1 |