Stadium: Court 2 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/03/15 08:00 | Kai Lemstra v John Sperle | 6-3,6-3 |
| ITF M15 Monastir | 2021/03/14 08:00 | Guy Orly Iradukunda v Kai Lemstra | 3-6,5-7 |
| ITF M15 Monastir | 2021/03/11 10:40 | Kai Lemstra v Juan Bautista Torres | 4-6,1-6 |
| ITF M15 Monastir | 2021/03/10 12:15 | Kai Lemstra v Christoph Negritu | 6-4,2-6,6-1 |
| ITF M15 Monastir | 2021/03/08 18:00 | Anis Ghorbel v Kai Lemstra | 6-3,6-4 |
| ITF M15 Monastir | 2021/03/08 13:30 | Sabit Suntic v Kai Lemstra | 3-6,6-4,8-10 |
| ITF M15 Monastir | 2021/03/07 10:30 | Facundo Yunis v Kai Lemstra | 6-7,3-6 |
| ITF M15 Monastir | 2021/03/01 08:00 | Noah Lopez v Kai Lemstra | 3-6,7-5,10-7 |
| ITF M15 Monastir | 2021/03/15 08:00 | Vladislav Melnic v Alexander Kotzen | 6-3,6-7,10-12 |
| ITF M15 Monastir | 2021/03/14 08:00 | Leon Hoeveler v Alexander Kotzen | 3-6,6-7 |
| ITF M15 Monastir | 2021/03/10 08:30 | Franco Agamenone v Alexander Kotzen | 6-1,6-3 |
| ITF M15 Monastir | 2021/03/08 16:15 | Noah Lopez v Alexander Kotzen | 2-6,5-7 |
| ITF M15 Monastir | 2021/03/08 12:30 | Moritz Trocker v Alexander Kotzen | 2-6,6-3,3-10 |
| ITF M15 Monastir | 2021/03/07 10:30 | Gianluca Coloma-Heck v Alexander Kotzen | 0-6,1-6 |
| ITF M15 Monastir | 2021/03/04 08:30 | Alexander Kotzen v Enrico Dalla Valle | 4-6,4-6 |
| ITF M15 Monastir | 2021/03/03 08:30 | Alexander Kotzen v Leonardo Civita-Telles | 6-0,6-2 |