Round: 44 Ground: Clay
| ITF - M15 Antalya | 2019/11/03 07:00 | Gelhardt, Luca v Suntic, Sabit | 6-2,6-4 |
| ITF - M15 Antalya | 2019/10/28 07:00 | Gelhardt, Luca v Voros, Mate | 5-7,7-5,6-10 |
| ITF - M15 Antalya | 2019/10/27 07:00 | Gelhardt, Luca v Ziganshin, Robert | 6-1,6-2 |
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/10 08:50 | Tepavac, Marko v Gelhardt, Luca | 6-0,7-5 |
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/09 09:00 | Gelhardt, Luca v Terziev, Simeon | 6-2,7-6 |
| ITF - M15 Antalya | 2019/10/02 10:30 | Gelhardt, Luca v Yanki Erel | 2-6,6-0,2-6 |
| ITF - M15 Antalya | 2019/09/25 07:30 | Gelhardt, Luca v Dimitar Kuzmanov | 1-6,2-6 |
| ITF - M15 Antalya | 2019/09/19 08:55 | Michael Vrbensky v Gelhardt, Luca | 4-6,6-2,6-0 |
| ITF - M15 Antalya | 2019/11/03 09:00 | Busch, Ruben v Dabryian, Artsiom | 6-4,2-6,10-8 |
| ITF - M15 Antalya | 2019/10/27 09:00 | Busch, Ruben v Arh, Anze | 1-6,2-6 |
| Vigo, Singles M-ITF-ESP-21A | 2019/08/12 08:30 | Busch, Ruben v Borras Isern, Joan B | 6-7,0-6 |
| ITF M15 Telavi | 2019/07/29 06:00 | Cengiz Aksu v Busch, Ruben | 6-1,6-2 |
| ITF M15 Telavi | 2019/07/22 08:00 | Mikula, Michal v Busch, Ruben | 6-1,6-4 |
| ITF M15 Telavi | 2019/07/15 06:00 | Busch, Ruben v Nikitin, Viktor | 2-6,3-6 |
| ITF - M15 Antalya | 2019/03/11 07:15 | Nitin Kumar Sinha v Busch, Ruben | 7-6,6-0 |
| ITF - M15 Antalya | 2019/03/04 08:00 | Mircea-Alexandru Jecan v Busch, Ruben | 6-0,6-0 |