Estádio: Court 1 Round: 64 Ground: Hardcourt indoor
| ITF - Itália F2 | 2017/03/01 14:10 | Viktor Galovic v Johannes Haerteis | 1-6,6-7 |
| Challenger - Bratislava | 2020/11/08 11:00 | Johannes Haerteis v Julian Lenz | 7-6,4-6,6-7 |
| Challenger - Eckental | 2020/11/04 12:55 | Sebastian Korda v Johannes Haerteis | 6-2,1-6,6-1 |
| Challenger - Eckental | 2020/11/02 18:40 | Yannick Maden v Johannes Haerteis | 2-6,6-4,3-6 |
| Challenger - Eckental | 2020/11/01 13:15 | Lukas Klein v Johannes Haerteis | 1-6,4-6 |
| Challenger - Eckental | 2020/10/31 09:00 | Leopold Zima v Johannes Haerteis | 0-6,3-6 |
| Challenger - Ismaning | 2020/10/17 14:20 | Hugo Grenier v Johannes Haerteis | 6-3,6-4 |
| ITF - M25 Porto | 2020/10/01 11:30 | Alessandro Bega v Johannes Haerteis | 6-4,0-6,7-5 |
| ITF - M25 Porto | 2020/09/30 10:30 | Emilio Nava v Johannes Haerteis | 6-1,4-6,2-6 |
| ITF - M15 Quinta do Lago | 2020/11/05 09:50 | Viktor Galovic v Joao Monteiro | 4-6,4-6 |
| ITF - M15 Quinta do Lago | 2020/11/04 10:00 | Viktor Galovic v Antonio Cayetano March | 6-3,6-4 |
| ITF - M25 Vale do Lobo | 2020/10/30 12:00 | Viktor Galovic v Gastao Elias | 2-6,6-7 |
| ITF - M25 Vale do Lobo | 2020/10/29 12:40 | Viktor Galovic v Duje Ajdukovic | 6-4,6-4 |
| ITF - M25 Vale do Lobo | 2020/10/28 10:30 | Viktor Galovic v Genaro Alberto Olivieri | 6-4,6-2 |
| Challenger - Istambul | 2020/10/18 12:25 | Mackenzie McDonald v Viktor Galovic | 6-2,6-4 |
| Challenger - Istambul | 2020/10/17 08:45 | Ivan Nedelko v Viktor Galovic | 4-6,2-6 |
| Challenger - Lisboa | 2020/10/10 09:00 | Orlando Luz v Viktor Galovic | 6-4,4-6,6-4 |