Stadium: Salle Steredenn Round: 45 Ground: Hardcourt indoor
| ITF France F8 Qual | 2015/04/19 16:15 | Gueydan, Quentin v Joffrey De Schepper | 5-7,5-7 |
| Challenger Lille Qual | 2018/03/17 10:45 | Guez, David v Gueydan, Quentin | 6-1,6-4 |
| ITF France F5 Qual | 2018/03/10 08:30 | Gueydan, Quentin v Louis Dussin | 4-6,4-6 |
| ITF Portugal F2 | 2018/03/03 11:00 | Gueydan, Quentin v Evan Furness | 1-6,0-6 |
| ITF Portugal F2 | 2018/03/02 17:05 | Gueydan, Quentin v Ivan Marrero Curbelo | 0-6,6-1,7-6 |
| ITF Portugal F2 Qual | 2018/02/26 10:00 | Gueydan, Quentin v Zemel, Yankel | 7-5,6-4 |
| ITF Portugal F2 Qual | 2018/02/25 14:00 | Gueydan, Quentin v Morr, Jonathan | 6-3,6-4 |
| ITF Portugal F2 Qual | 2018/02/25 10:00 | Gueydan, Quentin v Antonio, Joao | 6-2,6-3 |
| ITF Portugal F2 Qual | 2018/02/24 12:30 | Ribeiro Marcondes, Igor v Gueydan, Quentin | 6-7,1-6 |
| ITF France F6 | 2018/03/19 13:05 | Davydenko, Philipp v Joffrey De Schepper | 6-7,6-4,6-4 |
| ITF France F5 Qual | 2018/03/11 09:35 | Joffrey De Schepper v Harold Mayot | 4-6,4-6 |
| France F4, Singles | 2018/03/06 13:05 | Jomby, Tom v Joffrey De Schepper | 6-4,6-4 |
| ITF France F4 Qual | 2018/03/04 11:30 | Perchicot, Mathieu v Joffrey De Schepper | 3-6,7-6,3-6 |
| ITF France F4 Qual | 2018/03/03 09:00 | Allan Deschamps v Joffrey De Schepper | 3-6,2-6 |
| ITF Portugal F2 Qual | 2018/02/27 13:20 | Joffrey De Schepper v Bourcet, Tony | 6-3,3-6,2-6 |
| ITF Portugal F2 Qual | 2018/02/25 16:00 | Joffrey De Schepper v Korobeynikov, Grigoriy | 6-1,6-1 |
| ITF Portugal F2 Qual | 2018/02/25 13:00 | Joffrey De Schepper v Joao Graca | 6-1,6-3 |