| ITF Portugal F20 | 2017/09/26 09:00 | Desein, Niels v Ivan Marrero Curbelo | 6-4,6-2 |
| France F19, Singles | 2017/09/17 12:30 | Corrie, Edward v Desein, Niels | 3-6,6-4,3-6 |
| France F19, Singles | 2017/09/16 15:15 | Desein, Niels v Benjamin Hassan | 7-5,6-1 |
| France F19, Singles | 2017/09/15 11:00 | Desein, Niels v Jomby, Tom | 6-2,6-4 |
| France F19, Singles | 2017/09/14 09:00 | Desein, Niels v Joffrey De Schepper | 6-4,6-4 |
| France F19, Singles | 2017/09/13 09:00 | Niels Lootsma v Desein, Niels | 6-2,3-6,6-7 |
| ITF Belgium F12 | 2017/09/06 11:10 | Mertens, Nico v Desein, Niels | 6-1,1-6,7-6 |
| ITF Belgium F12 | 2017/09/05 11:55 | Desein, Niels v Billy Harris | 6-3,6-2 |
| ITF Portugal F20 | 2017/09/26 10:15 | Cabral, Francisco v Krstin, Pedja | 3-6,6-7 |
| St. Petersburg, Russia, Qualifying | 2017/09/17 08:00 | Nedelko, Ivan v Krstin, Pedja | 6-3,6-4 |
| Challenger Banja Luka | 2017/09/11 11:50 | Arnaboldi, Andrea v Krstin, Pedja | 5-7,6-1,6-3 |
| Challenger Alphen | 2017/09/05 15:00 | Krstin, Pedja v Sousa, Pedro | 4-6,6-4,2-6 |
| Challenger Tampere | 2017/07/25 09:30 | Krstin, Pedja v Sebastian Ofner | 7-6,5-7,4-6 |
| Poznan, Poland | 2017/07/19 09:00 | Pavlasek, Adam v Krstin, Pedja | 6-1,6-0 |
| Poznan, Poland | 2017/07/18 10:00 | Krstin, Pedja v Kapas, Andriej | 4-6,6-1,6-4 |
| ITF Italy F21 | 2017/07/11 19:00 | Licciardi, Pietro v Krstin, Pedja | 6-4,6-1 |