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