| ITF M15 - Heraklion | 11/07 09:00 | 26 | Alexander Erler v Lenny Hampel | 6-3,6-4 | |
| ITF M15 - Heraklion | 11/05 08:30 | 25 | Alexander Erler v Michael Zhu | 6-3,2-6,6-2 | |
| ATP Wien | 10/19 09:00 | 64 | Cameron Norrie v Alexander Erler | 6-4,6-2 | |
| ITF M15 - Olomouc | 10/16 08:00 | 25 | Petr Michnev v Alexander Erler | Retired | |
| ITF M25 - Norman | 10/02 16:20 | 25 | [413] Alexander Cozbinov v Alexander Erler [487] | 7-6,3-6,6-4 | |
| ITF M25 - Harlingen | 09/26 01:40 | 25 | Alexander Erler v Logan Smith | 1-6,3-6 | |
| ITF M25 - Harlingen | 09/25 18:30 | - | Alexander Erler v Logan Smith | 1-6,3-5 | |
| Challenger Columbus 3 | 09/18 18:50 | 25 | [429] Alexander Erler v Mikael Torpegaard [167] | 2-6,7-6,1-6 | |
| Challenger Columbus 3 | 09/17 15:40 | 24 | [460] Colin Sinclair v Alexander Erler [429] | 5-7,6-7 | |
| Challenger Banja Luka | 09/10 08:00 | 24 | [423] Camilo Ugo Carabelli v Alexander Erler [461] | 6-4,3-6,6-3 | |
| ITF M25 - Trieste | 09/07 14:30 | 29 | [399] Juan P Varillas v Alexander Erler [451] | 6-7,6-1,6-4 | |
| ITF M25 - Trieste | 09/06 12:00 | 28 | Tom Kocevar-Desman v Alexander Erler | 1-6,0-6 | |
| ITF M25 - Trieste | 09/05 12:15 | 27 | [451] Alexander Erler v Sandro Ehrat [289] | 6-2,7-5 | |
| ITF M25 - Trieste | 09/04 12:50 | 26 | Alexander Erler v Gregorio Lulli | 3-6,6-2,6-3 | |
| ITF M25 - Trieste | 09/03 13:45 | 25 | [384] Adam Pavlasek v Alexander Erler [451] | 3-6,3-6 | |
| ITF M25 - Schlieren | 08/22 11:55 | 26 | [299] Jakub Paul v Alexander Erler [449] | 3-6,6-2,6-2 | |
| ITF M25 - Schlieren | 08/21 08:00 | 25 | Gian Luca Tanner v Alexander Erler | 4-6,6-2,4-6 | |
| Challenger Portoroz | 08/12 08:00 | 166 | [437] Alexander Erler v Nicolas Barrientos [412] | 6-3,2-6,2-6 | |
| ITF M15 - Tabarka | 07/31 08:00 | 25 | Alexander Erler v Hugo Pontico | 3-6,6-3,6-7 | |
| ITF M15 - Wels | 07/28 08:00 | 29 | Alexander Erler v Duje Kekez | 6-4,6-4 | |
| ITF M15 - Wels | 07/27 12:20 | 28 | Alexander Erler v Tomas Jirousek | 6-1,6-3 | |
| ITF M15 - Wels | 07/26 15:30 | 27 | Alexander Erler v Tom Kocevar-Desman | 6-1,6-2 | |
| ITF M15 - Wels | 07/25 12:30 | 26 | Alexander Erler v Jakob Aichhorn | 6-1,6-2 | |
| ITF M15 - Wels | 07/23 12:10 | 25 | Alexander Erler v Toby Martin | 7-5,7-5 | |
| ITF M15 - Telfs | 07/14 10:00 | 29 | Sandro Ehrat v Alexander Erler | 6-4,6-7,6-3 | |
| ITF M15 - Telfs | 07/13 15:15 | 28 | Vit Kopriva v Alexander Erler | 3-6,1-6 | |
| ITF M15 - Telfs | 07/12 08:00 | 27 | Alexander Erler v Tomas Machac | 3-6,7-6,7-6 | |
| ITF M15 - Telfs | 07/11 08:00 | 26 | Alexander Erler v Andrea Bolla | 7-5,6-3 | |
| ITF M15 - Telfs | 07/09 13:00 | 25 | Alexander Erler v Michal Konecny | 6-4,6-2 | |
| ITF M15 - Saarlouis | 07/02 10:00 | 25 | Alexander Erler v Niklas Guttau | 4-6,6-4,5-7 |