Stadium: Court 3 Round: 54 Ground: Clay
| ITF M25 Mungia | 2023/06/18 09:30 | Joshua Schaefer v Kane Bonsach Ganley | 4-6,4-6 |
| ITF M15 Rabat | 2023/06/11 13:00 | Esteban Bruna v Joshua Schaefer | 6-4,4-6,5-10 |
| ITF M15 Kalmar | 2023/05/15 08:15 | Joshua Schaefer v Filip Gustafsson | 1-6,3-6 |
| ITF M25 Varnamo | 2023/05/08 11:00 | Joshua Schaefer v Anton Krondell | 7-5,7-6 |
| ITF M15 Kursumlijska Banja | 2023/05/01 09:55 | Alexandru Luca v Joshua Schaefer | 6-3,6-7,10-6 |
| ITF M15 Kursumlijska Banja | 2023/04/24 08:40 | Alessandro Bellifemine v Joshua Schaefer | 6-2,6-2 |
| ITF M25 Angers | 2023/04/16 08:00 | Artiom Dorofeev v Joshua Schaefer | 6-0,6-0 |
| ITF M25 Reus | 2023/04/02 12:00 | Gregoire Gervail v Joshua Schaefer | 7-6,6-4 |
| ITF M15 Duffel | 2023/06/12 15:45 | Facundo Yunis v Piet Steveker | 6-2,6-4 |
| ITF M15 Duffel | 2023/06/11 16:00 | Tom Clavel v Piet Steveker | 3-6,7-5,8-10 |
| ITF M15 Meerbusch | 2023/04/27 13:45 | Piet Steveker v Marat Sharipov | 2-6,6-7 |
| ITF M15 Meerbusch | 2023/04/25 11:00 | Piet Steveker v Paulo Knippling | 4-6,7-5,6-2 |
| German Championship | 2022/12/04 11:00 | Aaron Funk v Piet Steveker | 3-6,6-4,1-0 |