Stadium: Court 3 Round: 25 Ground: Clay
| ITF M25 Schlieren | 2019/08/21 08:55 | Jakub Paul v Jonas Schaer | 6-3,6-2 |
| ITF M15 Tanger | 2019/07/15 09:00 | Christopher Patzanovsky v Jonas Schaer | 6-4,2-6,13-11 |
| ITF M25 Oberentfelden | 2019/02/06 14:00 | Jonas Schaer v Mattia Bellucci | 2-6,4-6 |
| ITF M25 Oberentfelden | 2019/02/04 13:45 | Adam Moundir v Jonas Schaer | 6-0,5-7,8-10 |
| ITF M25 Oberentfelden | 2019/02/04 08:30 | Jonas Schaer v Luca Staeheli | 6-7,6-3,10-8 |
| ITF Turkey F31 | 2018/10/07 07:00 | Jonas Schaer v Cosmin Ontica | 2-6,7-5,4-6 |
| ITF Turkey F31 | 2018/10/06 07:00 | Jonas Schaer v Charles Tzicas | 3-6,7-6,6-1 |
| ITF Turkey F30 | 2018/10/01 07:30 | Lucas Gerch v Jonas Schaer | 6-4,6-4 |
| ITF M25 Schlieren | 2019/08/21 09:55 | Tobias Simon v Patrik Hartmeier | 6-3,6-3 |
| ITF M15 Trier | 2019/08/13 09:30 | Niklas Schell v Patrik Hartmeier | 6-4,6-2 |
| ITF M15 Bad Schussenried | 2019/07/22 09:30 | Patrik Hartmeier v Tim Handel | 4-6,6-7 |
| ITF M15 Kramsach | 2019/07/19 14:10 | Ronald Slobodchikov v Patrik Hartmeier | 6-2,6-0 |
| ITF M15 Kramsach | 2019/07/18 10:30 | Patrik Hartmeier v Mariano Kestelboim | 6-4,7-6 |
| ITF M15 Kramsach | 2019/07/17 13:30 | Gabriel Donev v Patrik Hartmeier | 4-6,3-6 |
| ITF M15 Alkmaar | 2019/06/25 08:00 | Patrik Hartmeier v Amadatus Admiraal | 6-1,4-6,7-10 |
| ITF M15 Reggio Emilia | 2019/05/27 12:30 | Giacomo Dambrosi v Patrik Hartmeier | 7-6,7-6 |