Estadio: Court 7 Round: 26 Ground: Clay
| ITF M15 Skopje | 2021/06/01 11:00 | Mats Rosenkranz v Alexander Weis | 4-6,6-2,0-6 |
| ITF M15 Valldoreix | 2021/05/09 14:00 | Louis Dussin v Alexander Weis | 6-3,6-1 |
| ITF M15 Las Palmas de Gran Canaria | 2021/04/29 11:55 | Alexander Weis v Eduard Esteve Lobato | 3-6,2-6 |
| ITF M15 Las Palmas de Gran Canaria | 2021/04/28 11:25 | Alexander Weis v Diego F Flores | 0-6,6-2,6-3 |
| ITF M25 Angers | 2021/04/20 10:35 | Alexander Weis v Vincent Stouff | 7-6,3-6,3-6 |
| ITF M25 Angers | 2021/04/19 10:35 | Alexander Weis v Simon Reveniau | 6-3,6-3 |
| ITF M25 Reus | 2021/04/12 07:30 | Alexander Weis v Sean Cuenin | 2-6,6-4,10-3 |
| ITF M25 Reus | 2021/04/11 10:00 | Alexander Weis v Samuel M Arjona | 7-6,5-7,10-4 |
| ITF M15 Skopje | 2021/06/02 11:45 | Tomislav Jotovski v Martin Damm | 6-7,4-6 |
| ITF M25 Most | 2021/05/26 07:55 | Alex Rybakov v Martin Damm | 6-4,6-2 |
| ITF M25 Most | 2021/05/25 07:55 | Martin Damm v Dominik Recek | 6-3,6-3 |
| ITF M25 Most | 2021/05/24 08:00 | Martin Damm v Adam Januska | 6-0,6-1 |
| ITF M25 Most | 2021/05/23 14:00 | Martin Damm v Ondrej Horak | 7-5,6-4 |
| ITF M25 Vic | 2021/05/17 09:00 | Miguel Damas v Martin Damm | 6-3,6-7,10-6 |
| ITF M15 Valldoreix | 2021/05/13 08:00 | Tiago Cacao v Martin Damm | 3-6,6-1,6-4 |
| ITF M15 Valldoreix | 2021/05/12 07:55 | Martin Damm v Vladyslav Orlov | 6-4,6-3 |