Stadium: Court 8 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/08/22 14:30 | Adrian Arcon v Alec Beckley | 5-7,0-6 |
| ITF M15 Monastir | 2021/08/15 11:00 | Keisuke Saitoh v Alec Beckley | 6-3,4-6,10-4 |
| ITF M15 Monastir | 2021/07/11 10:00 | Alec Beckley v Victor Gurevich | 6-3,2-6,10-7 |
| ITF M15 Monastir | 2021/07/07 13:20 | Kelsey Stevenson v Alec Beckley | 6-3,2-6,3-6 |
| ITF M15 Monastir | 2021/07/05 14:00 | Jake Van Emburgh v Alec Beckley | 4-6,6-7 |
| ITF M15 Monastir | 2021/07/05 09:00 | Alec Beckley v Sebastian Eguez | 6-1,6-4 |
| ITF M15 Monastir | 2021/06/27 08:00 | Alec Beckley v Jake Van Emburgh | 6-7,3-6 |
| ITF M15 Monastir | 2021/06/21 09:00 | Perry Gregg v Alec Beckley | 6-1,7-6 |
| ITF M15 Monastir | 2021/08/22 12:00 | Lucca Pinto v Kai Lemstra | 3-6,0-6 |
| ITF M15 Monastir | 2021/08/18 09:00 | Kai Lemstra v Duarte Vale | 4-6,3-6 |
| ITF M15 Monastir | 2021/08/17 07:30 | Federico Salomone v Kai Lemstra | 4-6,6-4,8-10 |
| ITF M15 Monastir | 2021/08/16 07:30 | Kai Lemstra v Blake Ellis | 6-4,6-3 |
| ITF M25 Wetzlar | 2021/08/02 14:00 | Osman Torski v Kai Lemstra | 6-4,0-6,10-5 |
| ITF M25 Most | 2021/05/26 10:15 | Antoine Escoffier v Kai Lemstra | 6-3,7-5 |
| ITF M25 Most | 2021/05/25 10:15 | Kai Lemstra v Edward Hubner | 6-1,6-1 |
| ITF M25 Most | 2021/05/24 08:00 | Kai Lemstra v Niklas Rohrer | 6-3,6-2 |