Stadium: Center Court Round: 25 Ground: Hardcourt indoor
| ITF France F7 | 2017/03/22 18:40 | Desein, Niels v Boltz, Sebastien | 7-6,7-5 |
| ITF France F21 | 2014/10/03 10:00 | Boltz, Sebastien v Desein, Niels | 2-6,5-7 |
| ITF France F22 | 2017/10/03 15:45 | Desein, Niels v Corentin Denolly | 5-7,3-6 |
| ITF Portugal F20 | 2017/09/27 09:30 | Desein, Niels v Krstin, Pedja | 4-6,4-6 |
| 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 Serbia F2 | 2017/08/16 09:40 | Roncalli, Simone v Boltz, Sebastien | 6-4,6-2 |
| ITF Serbia F1 | 2017/08/10 09:50 | Boltz, Sebastien v Ornago, Fabrizio | 0-6,3-6 |
| ITF Serbia F1 | 2017/08/09 09:00 | Miladinovic, Marko v Boltz, Sebastien | 2-6,4-6 |
| ITF Slovakia F2 | 2017/08/04 09:40 | Lukas Klein v Boltz, Sebastien | 7-6,6-7,6-2 |
| ITF Slovakia F2 | 2017/08/03 10:00 | Vitaliy Sachko v Boltz, Sebastien | 5-7,6-2,4-6 |
| ITF Slovakia F2 | 2017/08/02 08:00 | Onishi, Ken v Boltz, Sebastien | 3-6,6-4,6-7 |
| ITF France F17 | 2017/07/25 16:10 | Boltz, Sebastien v Antoine Hoang | 5-7,2-6 |
| ITF France F15 | 2017/07/11 07:00 | Martinez Sarrasague, Felipe v Boltz, Sebastien | 6-7,7-5,6-0 |