Stadium: Court 14 Round: 62
| ITF Portugal F2 Qual | 2018/02/25 10:00 | Gueydan, Quentin v Antonio, Joao | 6-2,6-3 |
| ITF Portugal F15 | 2018/08/12 11:30 | George Houghton v Antonio, Joao | 6-4,6-3 |
| ITF Portugal F14 | 2018/08/05 07:00 | Almeida, Tomas v Antonio, Joao | 7-5,6-4 |
| ITF Portugal F13 | 2018/07/31 10:00 | Wojnar, Bartosz v Antonio, Joao | 6-0,6-7,6-3 |
| ITF Portugal F11 Qual | 2018/07/02 11:00 | Ivan Marrero Curbelo v Antonio, Joao | 6-2,2-6,7-5 |
| ITF Portugal F10 | 2018/06/25 12:30 | Eon, Julien v Antonio, Joao | 3-6,7-6,6-3 |
| ITF Portugal F10 | 2018/06/24 12:00 | Antonio, Joao v Cortez, Afonso | 6-1,6-0 |
| ITF Portugal F8 Qual | 2018/04/15 14:30 | Fornell-Mestres, Marc v Antonio, Joao | 6-1,5-7,7-5 |
| ITF Portugal F6 Qual | 2018/03/24 13:00 | Antonio, Joao v Kaelin, Yanik | 1-6,3-6 |
| ITF Portugal F15 | 2018/08/14 11:00 | Hoyt, Evan v Gueydan, Quentin | 6-0,6-3 |
| ITF Portugal F15 | 2018/08/13 08:30 | Gueydan, Quentin v Salgado, Afonso | 6-1,6-3 |
| ITF Portugal F15 | 2018/08/12 08:30 | Gueydan, Quentin v Almeida, Eduardo Lobo Da Rosa de | 6-1,6-3 |
| ITF Portugal F15 | 2018/08/11 11:00 | Gueydan, Quentin v Price, Cameron | 6-1,6-2 |
| ITF Spain F22 | 2018/08/07 18:25 | Brugnerotto, Marco v Gueydan, Quentin | 6-2,6-3 |
| ITF Spain F22 | 2018/08/05 18:00 | Gueydan, Quentin v Uspensky, Dennis | 0-6,3-6 |
| ITF Spain F22 | 2018/08/04 18:30 | Gueydan, Quentin v Anthony Popyrin | 6-1,6-1 |
| ITF France F13 | 2018/07/09 13:30 | Deviatiarov, Marat v Gueydan, Quentin | 6-2,6-1 |