Stadium: Central Hard Court Round: 29 Ground: Hardcourt outdoor
| ITF - M15 Heraklion | 2019/11/16 12:00 | Yshai Oliel v Alexander Erler | 4-6,6-2,1-6 |
| ITF - M15 Heraklion | 2019/11/16 08:00 | Alexander Erler v Nikita Mashtakov | 6-1,3-6,6-3 |
| ITF - M15 Heraklion | 2019/11/15 08:00 | Alexander Erler v Billy Harris | 6-3,3-6,6-4 |
| ITF - M15 Heraklion | 2019/11/12 08:30 | Alexander Erler v Toby Martin | 6-3,3-6,6-3 |
| ITF - M15 Heraklion | 2019/11/08 08:00 | Alexander Erler v Yshai Oliel | 2-6,3-6 |
| ITF - M15 Heraklion | 2019/11/07 09:00 | Alexander Erler v Lenny Hampel | 6-3,6-4 |
| ITF - M15 Heraklion | 2019/11/05 08:30 | Alexander Erler v Michael Zhu | 6-3,2-6,6-2 |
| ATP - Viena | 2019/10/19 09:00 | Cameron Norrie v Alexander Erler | 6-4,6-2 |
| ITF - M15 Heraklion | 2019/11/16 12:00 | Jan Zielinski v Patrick Kypson | 6-4,6-2 |
| ITF - M15 Heraklion | 2019/11/16 08:00 | Jan Zielinski v Jonas Trinker | 6-3,6-2 |
| ITF - M15 Heraklion | 2019/11/15 08:00 | Jan Zielinski v Vasil Kirkov | 6-3,6-3 |
| ITF - M15 Heraklion | 2019/11/12 13:05 | Tom Kocevar-Desman v Jan Zielinski | 1-6,4-6 |
| ITF - M15 Sharm El Sheikh | 2019/10/30 11:25 | Jan Zielinski v Kacper Zuk | 3-6,3-6 |
| ITF - M15 Sharm El Sheikh | 2019/10/23 08:00 | Karim-Mohamed Maamoun v Jan Zielinski | 7-5,6-2 |
| ITF - M25 Falun | 2019/10/01 11:00 | Antoine Bellier v Jan Zielinski | 6-4,6-4 |
| ITF - M25 Falun | 2019/09/30 09:10 | Jan Zielinski v Jonathan Stenberg | 6-3,6-4 |