Stadium: Court 1 Round: 25 Ground: Clay
| ITF M15 Káhira | 2021/07/30 08:00 | Juan Bautista Torres v Gustavo Heide | 7-6,6-1 |
| ITF M15 Káhira | 2021/07/29 08:00 | Gustavo Heide v Kai Wehnelt | 3-6,7-5,6-3 |
| ITF M15 Káhira | 2021/07/28 12:30 | Gustavo Heide v Jaimee Floyd Angele | 6-4,2-6,6-0 |
| ITF M15 Monastir | 2021/06/01 12:35 | Robert Strombachs v Gustavo Heide | 6-0,6-4 |
| ITF M15 Monastir | 2021/05/26 14:25 | Gustavo Heide v Eliakim Coulibaly | 4-6,3-6 |
| ITF M15 Monastir | 2021/05/21 08:30 | Gustavo Heide v Yunseong Chung | 3-6,3-6 |
| ITF M15 Monastir | 2021/05/20 11:25 | Gustavo Heide v Berk Ilkel | 7-5,6-4 |
| ITF M15 Monastir | 2021/05/18 11:00 | Santiago Rodriguez Taverna v Gustavo Heide | 6-7,6-0,5-7 |
| ITF M15 Káhira | 2021/08/03 07:20 | Mathys Erhard v Menelaos Efstathiou | 5-7,6-3,10-3 |
| ITF M15 Káhira | 2021/08/02 08:30 | Mathys Erhard v Karim El Feky | 6-2,6-1 |
| ITF M15 Káhira | 2021/07/28 08:00 | Quentin Folliot v Mathys Erhard | 6-3,6-4 |
| ITF M15 Káhira | 2021/07/27 10:00 | Mathys Erhard v Edoardo Zanada | 6-0,4-6,10-8 |
| ITF M15 Káhira | 2021/07/26 08:00 | Mathys Erhard v Federico Campana | 6-1,6-4 |
| ITF M15 Káhira | 2021/07/25 07:00 | Mathys Erhard v Bharath Nishok Kumaran | 6-0,6-2 |
| ITF M25 Uriage | 2021/07/14 16:20 | Mathys Erhard v Edouard Villoslada | 6-2,6-4 |
| ITF M25 Grasse | 2021/06/17 11:30 | Franco Agamenone v Mathys Erhard | 6-4,7-6 |