| 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 | |
| ITF M25 Santa Margherita | 10/09 14:30 | 25 | Gabriele Pennaforti v Alexander Weis | 5-7,7-5,6-4 | |
| Challenger Lisbona | 10/03 15:20 | 25 | Alexander Weis v Calvin Hemery | 1-6,3-6 | |
| Challenger Lisbona | 10/02 11:45 | 19 | [296] Alexander Weis v Henrique Rocha [325] | 3-6,7-6,6-1 | |
| Challenger Lisbona | 10/01 14:05 | 14 | Alexander Weis v Joao Domingues | 5-7,7-6,7-6 | |
| Challenger Braga | 09/24 10:15 | 14 | [345] Javier Barranco Cosano v Alexander Weis [299] | 6-4,6-2 | |
| Challenger Sibiu | 09/20 07:00 | 26 | [163] Ivan Gakhov v Alexander Weis [299] | 7-6,6-7,7-6 | |
| Challenger Sibiu | 09/19 07:00 | 25 | [299] Alexander Weis v Michael Vrbensky [381] | 6-4,4-6,6-2 | |
| Challenger Como | 08/29 09:00 | 19 | [385] Samuel Vincent Ruggeri v Alexander Weis [295] | 6-2,7-6 | |
| Challenger Como | 08/28 10:05 | 14 | [452] Lorenzo Rottoli v Alexander Weis [295] | 4-6,2-6 | |
| Challenger Augsburg | 08/22 12:20 | 25 | [309] Alexander Weis v Matteo Martineau [356] | 2-6,7-5,4-6 | |
| ITF M25 Muttenz | 08/20 08:45 | 29 | [309] Alexander Weis v Matteo Martineau [358] | 1-6,7-6,3-6 | |
| ITF M25 Muttenz | 08/19 12:20 | 28 | Alexander Weis v Nicolas Zanellato | 6-2,6-2 | |
| ITF M25 Muttenz | 08/18 09:00 | 27 | [309] Alexander Weis v Daniel Masur [416] | 4-6,6-4,6-4 | |
| ITF M25 Muttenz | 08/17 08:00 | 26 | Alexander Weis v Andrin Casanova | 6-0,3-6,6-3 | |
| ITF M25 Muttenz | 08/16 12:30 | 25 | Alexander Weis v Giuseppe La Vela | 7-6,6-4 | |
| Challenger San Marino | 08/05 09:00 | 27 | [254] Andrea Pellegrino v Alexander Weis [305] | 7-6,7-6 | |
| Challenger San Marino | 08/03 14:00 | 26 | [305] Alexander Weis v Valentin Vacherot [261] | 6-4,3-6,7-6 | |
| Challenger San Marino | 08/01 15:25 | 25 | [305] Alexander Weis v Gianluca Mager [248] | Retired | |
| Challenger San Marino | 07/31 11:20 | 19 | [305] Alexander Weis v Fausto Tabacco [488] | 7-6,6-4 | |
| Challenger San Marino | 07/30 15:10 | 14 | [305] Alexander Weis v Andrea Picchione [341] | 2-6,6-4,6-2 | |
| Challenger Verona | 07/23 14:15 | 14 | [301] Alexander Weis v Gonzalo Villanueva [498] | 6-7,6-3,4-6 | |
| ATP Gstaad | 07/15 13:30 | 26 | [130] Otto Virtanen v Alexander Weis [321] | 6-3,7-6 | |
| Challenger San Benedetto | 07/11 14:05 | 25 | [321] Alexander Weis v Carlos Sanchez Jover [401] | Retired | |
| Challenger San Benedetto | 07/10 09:00 | 19 | [321] Alexander Weis v Federico Arnaboldi [452] | 4-6,6-3,6-3 | |
| Challenger San Benedetto | 07/09 09:00 | 14 | [321] Alexander Weis v Luca Potenza [461] | 6-3,6-1 | |
| Challenger Milano | 07/06 11:35 | 26 | [154] Luca Nardi v Alexander Weis [321] | 1-6,7-6,6-2 |