Stadium: Court 8 Round: 25 Ground: Clay
| ITF M15 - Uslar | 2023/07/19 09:55 | Juan C P Angelo v Justin Engel | 6-2,6-4 |
| ITF M15 - Uslar | 2023/07/17 16:00 | Justin Engel v Noah Schlagenhauf | 6-3,6-0 |
| ITF M15 - Uslar | 2023/07/17 08:00 | Andrea Gola v Justin Engel | 2-6,3-6 |
| ITF M25 - Kassel | 2023/07/13 09:25 | Daniel Dutra Da Silva v Justin Engel | 6-1,6-3 |
| ITF M25 - Kassel | 2023/07/12 09:55 | Justin Engel v Hazem Naw | 4-6,6-4,6-4 |
| Challenger - Karlsruhe | 2023/07/02 11:40 | Justin Engel v Carlos Sanchez Jover | 6-0,3-6,3-6 |
| ITF M15 - Oberhaching | 2023/02/12 09:00 | Justin Engel v Michael Gloeckler | 4-6,3-6 |
| ITF M15 - Antalya | 2022/10/24 10:30 | Nicolas Parizzia v Justin Engel | 6-0,6-2 |
| ITF M15 - Uslar | 2023/07/19 12:35 | John H Lithen v Diego Dedura-Palomero | 6-3,6-1 |