| ATP Monaco | 04/13 13:05 | 14 | [295] Alexander Weis v Ivan Gakhov [223] | 6-7,1-6 | |
| Challenger Florianopolis | 04/02 18:35 | 25 | [290] Alexander Weis v Genaro Alberto Olivieri [180] | 4-6,6-4,4-6 | |
| Challenger Sao Leopoldo | 03/26 16:00 | 25 | [304] Alexander Weis v Andrea Collarini [274] | 3-6,4-6 | |
| Challenger Asuncion | 03/23 00:10 | 27 | [304] Alexander Weis v Gustavo Heide [225] | 3-6,6-7 | |
| Challenger Asuncion | 03/21 21:10 | 26 | [183] Hugo Dellien v Alexander Weis [304] | 4-6,0-6 | |
| Challenger Asuncion | 03/20 00:55 | 25 | [443] Juan Bautista Torres v Alexander Weis [304] | 4-6,4-6 | |
| Challenger Santiago | 03/12 00:55 | 25 | [302] Alexander Weis v Ignacio Buse [454] | 6-4,4-6,2-6 | |
| Challenger Santa Cruz | 03/05 17:00 | 25 | [217] Goncalo Oliveira v Alexander Weis [302] | 6-3,6-3 | |
| ITF M25 Antalya | 02/20 10:35 | 25 | Alexander Weis v Brian Bozemoj | Retired | |
| Challenger Piracicaba | 02/02 16:25 | 27 | [308] Alexander Weis v Matheus P De Almeida [343] | 6-7,6-7 | |
| Challenger Piracicaba | 02/01 13:00 | 26 | [472] Daniel Dutra Da Silva v Alexander Weis [308] | 3-6,3-6 | |
| Challenger Piracicaba | 01/30 18:35 | 25 | [308] Alexander Weis v Federico Agustin Gomez [367] | 4-6,6-4,6-3 | |
| Challenger Punta del Este | 01/21 14:00 | 14 | [370] Orlando Luz v Alexander Weis [313] | 7-5,6-4 | |
| Challenger Buenos Aires | 01/18 13:00 | 26 | [313] Alexander Weis v Edoardo Lavagno [238] | 4-6,7-5,5-7 | |
| Challenger Buenos Aires | 01/17 13:00 | 25 | [297] Oleksii Krutykh v Alexander Weis [313] | 3-6,3-6 | |
| Challenger Buenos Aires | 01/09 13:00 | 25 | [347] Hernan Casanova v Alexander Weis [311] | 6-2,7-6 | |
| Challenger Maia | 11/29 11:00 | 25 | Denis Yevseyev v Alexander Weis | Cancelled | |
| ITF M25 Antalya | 11/25 07:00 | 28 | [223] Nerman Fatic v Alexander Weis [304] | 5-7,7-6,6-2 | |
| ITF M25 Antalya | 11/24 06:55 | 27 | [304] Alexander Weis v Sandro Kopp [467] | 6-4,4-6,6-0 | |
| ITF M25 Antalya | 11/23 09:05 | 26 | Alexander Weis v Maxim Zhukov | 6-4,6-1 | |
| ITF M25 Antalya | 11/22 11:15 | 25 | Alexander Weis v Kanan Gasimov | 6-3,6-1 | |
| ITF M25 Antalya | 11/19 07:20 | 29 | [453] Tim Handel v Alexander Weis [303] | 6-3,1-6,6-3 | |
| ITF M25 Antalya | 11/18 08:00 | 28 | [303] Alexander Weis v Jay Clarke [481] | 6-4,6-1 | |
| ITF M25 Antalya | 11/17 07:20 | 27 | [309] Timo Stodder v Alexander Weis [303] | 2-6,0-6 | |
| ITF M25 Antalya | 11/16 06:55 | 26 | Yanaki Milev v Alexander Weis | 3-6,6-4,0-6 | |
| ITF M25 Antalya | 11/15 09:55 | 25 | Illya Beloborodko v Alexander Weis | 4-6,4-6 | |
| ITF M25 Santa Margherita | 10/28 13:00 | 28 | [202] Oriol Roca Batalla v Alexander Weis [293] | 6-2,6-3 | |
| ITF M25 Santa Margherita | 10/28 08:30 | 27 | [293] Alexander Weis v Carlos Sanchez Jover [350] | 7-6,6-3 | |
| ITF M25 Santa Margherita | 10/25 08:00 | 26 | Alexander Weis v Gian M Di Natale | 6-0,6-4 | |
| ITF M25 Santa Margherita | 10/23 12:00 | 25 | [293] Alexander Weis v Alex M Pujolras [424] | 6-2,6-3 |