Stadium: Center Court Round: 54 Ground: Clay
| ITF M15 Antalya | 2021/06/27 06:30 | Osman Torski v Thiago Cigarran | 3-6,1-6 |
| ITF M15 Skopje | 2021/06/02 10:55 | Miljan Zekic v Osman Torski | 4-6,6-4,6-1 |
| ITF M15 Skopje | 2021/06/01 08:00 | Luka Pavlovic v Osman Torski | 6-2,2-6,5-10 |
| ITF M15 Skopje | 2021/05/31 11:00 | Osman Torski v Ivan Manasov | 6-2,6-2 |
| ITF M15 Troisdorf | 2021/05/10 11:00 | Aliaksandr Bulitski v Osman Torski | 6-0,6-3 |
| ITF M15 Troisdorf | 2021/05/09 10:00 | Osman Torski v Lucas Hellfritsch | 6-3,6-3 |
| ITF M15 Antalya | 2021/03/24 06:30 | Osman Torski v Deney Wassermann | 3-6,6-4,7-10 |
| ITF M15 Antalya | 2021/03/21 07:00 | Osman Torski v Federico Bertuccioli | 6-2,7-6 |
| 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 |
| ITF M25 Most | 2021/05/23 14:00 | Kai Lemstra v Vojtech Petr | 6-4,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/18 07:30 | Andrew Paulson v Kai Lemstra | 6-3,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/17 07:30 | Jan Jermar v Kai Lemstra | 4-6,4-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 08:30 | Matyas Cerny v Kai Lemstra | 3-6,3-6 |
| ITF M25 Meerbusch | 2021/04/12 09:30 | Marvin Netuschil v Kai Lemstra | 6-2,6-3 |