Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Sharm El Sheikh | 2021/10/20 08:00 | Ryan Nijboer v Cezar Cretu | 6-1,6-0 |
| ITF M25 Pretoria | 2021/10/01 10:30 | Ryan Nijboer v Pervolarakis, Michail | 3-6,1-6 |
| ITF M25 Pretoria | 2021/09/30 07:30 | Ryan Nijboer v Badenhorst, Devin | 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 | Schmitz, Constantin v Ryan Nijboer | 4-6,2-6 |
| ITF - M15 Sharm El Sheikh | 2021/10/20 09:05 | Pijus Vaitiekunas v Huang, Haoyuan | 5-7,4-6 |
| ITF - M15 Sharm El Sheikh | 2021/10/19 09:05 | Huang, Haoyuan v Ali Habib | 6-3,6-4 |
| Qujing, Simples M-ITF-CHN-13A | 2019/07/10 06:20 | Huang, Haoyuan v Jonathan Mridha | 3-6,3-6 |
| Hengyang, Simples M-ITF-CHN-10A | 2019/06/17 05:00 | Huang, Haoyuan v Liu, Hu | 6-3,3-6,6-10 |
| Anning, China | 2019/04/15 02:00 | Patael, Ben v Huang, Haoyuan | 6-4,6-2 |