Stadium: Court 7 Round: 27 Ground: Clay
| ITF Italy F3 | 2018/03/13 16:20 | Alexander Weis v Maciej Rajski | 2-6,5-7 |
| ITF M25 Pardubice | 2021/09/23 10:30 | Alexander Weis v Toby Martin | 6-7,6-3,6-2 |
| ITF M25 Pardubice | 2021/09/22 08:00 | Alexander Weis v Mikalai Haliak | 7-6,6-4 |
| Challenger Banja Luka | 2021/09/05 11:05 | Dragos Nicolae Madaras v Alexander Weis | 6-3,6-0 |
| ITF M25 Sierre | 2021/09/01 11:35 | Yannik Steinegger v Alexander Weis | 6-7,7-6,6-3 |
| ITF M25 Caslano | 2021/08/27 12:35 | Alexander Weis v Calvin Hemery | 2-6,4-6 |
| ITF M25 Caslano | 2021/08/26 10:10 | Nicholas David Ionel v Alexander Weis | 3-6,3-6 |
| ITF M25 Caslano | 2021/08/25 13:00 | Tristan Schoolkate v Alexander Weis | 4-6,3-6 |
| ITF M15 Warmbad-Villach | 2021/08/22 09:00 | Peter Heller v Alexander Weis | 6-3,6-4 |
| ITF M25 Pardubice | 2021/09/23 12:45 | Maciej Rajski v Tim Handel | 5-7,6-4,7-5 |
| ITF M25 Pardubice | 2021/09/22 10:20 | Martin Krumich v Maciej Rajski | 7-6,3-6,6-7 |
| Challenger Szczecin | 2021/09/13 09:00 | Alexey Vatutin v Maciej Rajski | 5-7,6-3,6-4 |
| Challenger Szczecin | 2021/09/12 10:30 | Maciej Rajski v Rudolf Molleker | 7-5,6-4 |
| ITF M15 Lodz | 2021/08/22 08:30 | Maciej Rajski v Yann Wojcik | 6-3,6-7,6-1 |
| ITF M15 Lodz | 2021/08/21 08:00 | Gilbert S K Junior v Maciej Rajski | 4-6,6-7 |
| ITF M15 Lodz | 2021/08/20 10:00 | Pawel Juszczak v Maciej Rajski | 6-7,3-6 |
| ITF M15 Lodz | 2021/08/19 10:00 | Maciej Rajski v Michal Dembek | 7-6,6-2 |