Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Pretoria | 2021/10/01 10:30 | Ryan Nijboer v Michail Pervolarakis | 3-6,1-6 |
| ITF M25 Pretoria | 2021/09/30 07:30 | Ryan Nijboer v Devin Badenhorst | 6-3,5-7,6-3 |
| ITF M25 Pretoria | 2021/09/29 12:20 | Ryan Nijboer v Menelaos Efstathiou | 6-3,6-0 |
| ITF M25 Johannesburg | 2021/09/21 10:25 | Rio Noguchi v Ryan Nijboer | 7-6,2-6,6-3 |
| ITF M25 Johannesburg | 2021/09/15 08:00 | Alafia Ayeni v Ryan Nijboer | 7-5,6-3 |
| ITF M25 Trier | 2021/08/27 15:00 | Ryan Nijboer v Henri Squire | 2-6,3-6 |
| ITF M25 Trier | 2021/08/26 09:30 | Constantin Schmitz v Ryan Nijboer | 4-6,2-6 |
| ITF M25 Trier | 2021/08/25 09:00 | Tom Gentzsch v Ryan Nijboer | 3-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/10/13 10:25 | Kelsey Stevenson v Cezar Cretu | 6-1,1-6,7-5 |
| ITF M15 Sharm El Sheikh | 2021/10/06 09:35 | Nitin Kumar Sinha v Cezar Cretu | 4-6,6-1,6-2 |
| ITF M15 Pirot | 2021/09/26 11:30 | Luka Pavlovic v Cezar Cretu | 6-2,6-2 |
| ITF M15 Pirot | 2021/09/25 14:30 | Andrey Chepelev v Cezar Cretu | 4-6,6-4,5-7 |
| ITF M15 Pirot | 2021/09/25 09:35 | Cezar Cretu v Calin Manda | 6-4,6-1 |
| ITF M15 Pirot | 2021/09/23 11:00 | Cezar Cretu v Giorgio Tabacco | 6-4,6-3 |
| ITF M15 Pirot | 2021/09/22 08:00 | Cezar Cretu v Lukas Palovic | 6-4,6-4 |
| ITF M15 Curtea de Argeș | 2021/08/12 06:55 | Cezar Cretu v Nicholas David Ionel | 1-6,1-6 |