| Challenger Verona | 07/23 14:15 | 14 | [301] Alexander Weis v Gonzalo Villanueva [498] | 6-7,6-3,4-6 | |
| Gstaad, Switzerland | 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 | |
| Milan, Italy | 07/06 11:35 | 26 | [154] Luca Nardi v Alexander Weis [321] | 1-6,7-6,6-2 | |
| Milan, Italy | 07/04 13:25 | 25 | [321] Alexander Weis v Hugo Grenier [129] | 6-2,6-3 | |
| Milan, Italy | 07/03 08:00 | 19 | [321] Alexander Weis v Remy Bertola [363] | 6-3,6-3 | |
| Milan, Italy | 07/02 09:55 | 14 | Alexander Weis v Riccardo Di Vita | 6-2,6-4 | |
| Challenger Modena | 06/26 08:00 | 19 | [317] Alexander Weis v Remy Bertola [378] | 6-4,3-6,2-6 | |
| Challenger Modena | 06/25 09:30 | 14 | Alexander Weis v Lautaro Midon | 7-5,6-1 | |
| Parma II, Italy | 06/20 10:15 | 25 | Rola, Blaz v Alexander Weis | 6-3,1-6,6-3 | |
| Challenger Perugia | 06/13 10:05 | 25 | [289] Edoardo Lavagno v Alexander Weis [323] | 6-3,7-6 | |
| Challenger Perugia | 06/12 10:10 | 19 | [292] Lopez San Martin, Alvaro v Alexander Weis [323] | 6-3,6-7,6-7 | |
| Challenger Perugia | 06/11 11:55 | 45 | [397] Giovanni Oradini v Alexander Weis [320] | 1-6,4-6 | |
| Challenger Vicenza | 05/28 08:30 | 14 | [276] Giovanni Fonio v Alexander Weis [320] | 6-2,6-4 | |
| Challenger Skopje | 05/25 10:35 | 27 | [241] Madaras, Dragos Nicolae v Alexander Weis [341] | 6-3,6-3 | |
| Challenger Skopje | 05/24 11:05 | 26 | [341] Alexander Weis v Roman A Burruchaga [251] | 6-4,6-0 | |
| Challenger Skopje | 05/23 12:10 | 25 | [303] Nikola Milojevic v Alexander Weis [341] | Retired | |
| Challenger Skopje | 05/22 11:45 | 19 | [341] Alexander Weis v Marko Topo [443] | 6-3,6-3 | |
| Challenger Skopje | 05/21 12:25 | 14 | Alexander Weis v Edas Butvilas | 6-4,4-6,6-2 | |
| Challenger - Tunis | 05/17 12:15 | 26 | [210] Jesper De Jong v Alexander Weis [338] | 6-4,6-3 | |
| Challenger - Tunis | 05/16 15:20 | 25 | [338] Alexander Weis v Liam Broady [138] | 6-0,5-7,6-3 | |
| Challenger - Tunis | 05/16 08:30 | 19 | [235] Nicolas Mejia v Alexander Weis [338] | 4-6,3-6 | |
| Challenger - Tunis | 05/14 12:00 | 14 | [350] Hoang, Antoine v Alexander Weis [338] | 4-6,4-6 | |
| Challenger - Francavilla | 05/08 11:00 | 19 | [291] Giovanni Fonio v Alexander Weis [338] | 6-1,6-2 | |
| Challenger - Francavilla | 05/07 09:00 | 14 | Roncalli, Simone v Alexander Weis | 7-5,4-6,3-6 | |
| Challenger - Rome | 04/26 11:35 | 26 | [348] Alexander Weis v Alexander Ritschard [195] | 5-7,2-6 | |
| Challenger - Rome | 04/25 08:00 | 25 | [137] Fabian Marozsan v Alexander Weis [348] | 4-6,4-6 | |
| Challenger - Rome | 04/24 10:05 | 19 | [399] Ryan Nijboer v Alexander Weis [348] | 4-6,6-3,2-6 |