Stadium: Court 7 Hard Round: 25 Ground: Hardcourt outdoor
| ATP - Viena | 2019/10/19 09:00 | Cameron Norrie v Alexander Erler | 6-4,6-2 |
| ITF M25 Norman | 2019/10/02 16:20 | Alexander Cozbinov v Alexander Erler | 7-6,3-6,6-4 |
| ITF - M25 Harlingen | 2019/09/26 01:40 | Alexander Erler v Logan Smith | 1-6,3-6 |
| ITF - M25 Harlingen | 2019/09/25 18:30 | Alexander Erler v Logan Smith | 1-6,3-5 |
| Challenger Columbus 3 | 2019/09/18 18:50 | Alexander Erler v Mikael Torpegaard | 2-6,7-6,1-6 |
| Challenger Columbus 3 | 2019/09/17 15:40 | Colin Sinclair v Alexander Erler | 5-7,6-7 |
| Challenger - Banja Luka | 2019/09/10 08:00 | Camilo Ugo Carabelli v Alexander Erler | 6-4,3-6,6-3 |
| ITF M25 Trieste | 2019/09/07 14:30 | Juan Pablo Varillas v Alexander Erler | 6-7,6-1,6-4 |
| ITF - M15 Doha | 2019/10/22 12:00 | Michael Zhu v Francis Casey Alcantara | 4-6,5-7 |
| ITF - M15 Doha | 2019/10/16 17:35 | Michael Zhu v Bogdan Bobrov | 1-6,2-6 |
| ITF M25 Taipei | 2019/07/24 02:00 | Michael Zhu v Renta Tokuda | 1-6,4-6 |
| ITF M25 Taipei | 2019/07/16 03:55 | Michael Zhu v Rio Noguchi | 6-1,3-6,3-6 |
| ITF M25 Kunshan | 2019/07/05 04:10 | Tsung-Hua Yang v Michael Zhu | 7-6,6-1 |
| ITF M25 Kunshan | 2019/07/04 01:30 | Weiqiang Zheng v Michael Zhu | 2-6,6-3,4-6 |
| ITF M25 Kunshan | 2019/07/02 10:35 | Yuichi Ito v Michael Zhu | 6-7,5-7 |
| ITF - M25 Yinchuan | 2019/06/28 05:15 | Rio Noguchi v Michael Zhu | 7-6,6-3 |