Stadium: Court 3 Round: 25 Ground: Carpet indoor
| ITF - M25 Nussloch | 2020/01/20 18:15 | Mattia Bellucci v Aichhorn, Jakob | 3-6,4-6 |
| ITF - M25 Nussloch | 2020/01/20 12:10 | Steinorth, Torben v Aichhorn, Jakob | 2-6,5-7 |
| ITF - M25 Nussloch | 2020/01/19 09:00 | Moritz Hoffmann v Aichhorn, Jakob | 7-5,3-6,8-10 |
| Milovice, Singles M-ITF-CZE-10A | 2019/11/14 09:00 | Aichhorn, Jakob v Paulson, Andrew | 0-6,2-6 |
| Milovice, Singles M-ITF-CZE-10A | 2019/11/12 12:25 | Daniel Siniakov v Aichhorn, Jakob | 6-7,0-6 |
| ITF M15 Prague | 2019/11/05 10:10 | Marek Gengel v Aichhorn, Jakob | 7-5,5-7,10-8 |
| Liberec, Simples M-ITF-CZE-08A | 2019/10/23 12:50 | Aichhorn, Jakob v Konecny, Michal | 0-6,4-6 |
| Olomouc, Singles M-ITF-CZE-07A | 2019/10/17 14:00 | Vit Kopriva v Aichhorn, Jakob | 7-5,6-3 |
| ITF - M15 Manacor | 2020/01/15 12:35 | Haerteis, Johannes v Pablo Llamas Ruiz | 3-6,4-6 |
| ITF M15 Prague | 2019/11/06 14:40 | Oleksii Krutykh v Haerteis, Johannes | 4-6,7-6,6-2 |
| Challenger Eckental | 2019/10/29 09:00 | Smith, John-Patrick v Haerteis, Johannes | 7-6,6-7,7-6 |
| Challenger - Hambourg | 2019/10/22 08:00 | Cem Ilkel v Haerteis, Johannes | 7-5,6-1 |
| Challenger Ismaning | 2019/10/17 11:00 | Zdenek Kolar v Haerteis, Johannes | 6-7,6-7 |
| Challenger Ismaning | 2019/10/16 11:50 | Haerteis, Johannes v Haase, Robin | 6-4,6-7,7-6 |
| Challenger Ismaning | 2019/10/14 15:10 | Haerteis, Johannes v Neuchrist, Maximilian | 6-4,6-4 |
| Nur-Sultan II, Kazakhstan | 2019/10/01 04:00 | Reboul, Fabien v Haerteis, Johannes | 6-4,6-7,6-3 |