Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF Portugal F8 | 2018/04/18 12:00 | Pedro Gabriel Rodrigues v Dan Dowson | 7-5,3-6,1-6 |
| ITF Portugal F8 Qual | 2018/04/16 14:55 | Marc Fornell-Mestres v Dan Dowson | 2-6,0-6 |
| ITF Portugal F8 Qual | 2018/04/14 13:30 | Dan Dowson v Laelson Rodrigues | 6-4,6-2 |
| ITF Portugal F7 Qual | 2018/04/10 08:00 | Dan Dowson v Philipp Davydenko | 2-6,4-6 |
| ITF Portugal F7 Qual | 2018/04/09 08:00 | Omar Salman v Dan Dowson | 3-6,6-7 |
| ITF Portugal F7 Qual | 2018/04/08 12:00 | Dan Dowson v Russell Henderson | 6-4,6-0 |
| ITF Tunisia F12 | 2018/03/28 14:00 | Mariano Kestelboim v Dan Dowson | 6-3,6-0 |
| ITF Tunisia F11 | 2018/03/20 08:30 | Lucas Catarina v Dan Dowson | 6-3,6-3 |
| ITF Portugal F8 Qual | 2018/04/17 10:00 | Tiago Cacao v Boy Westerhof | 6-1,3-6,6-3 |
| ITF Portugal F7 | 2018/04/12 16:05 | Evan Furness v Tiago Cacao | 6-4,6-0 |
| ITF Portugal F7 | 2018/04/11 09:30 | Tiago Cacao v Maxime Janvier | 6-4,7-6 |
| ITF Portugal F6 | 2018/03/27 13:25 | Tiago Cacao v Pablo Vivero Gonzalez | 1-6,4-6 |
| ITF Portugal F5 | 2018/03/23 10:00 | Joao Monteiro v Tiago Cacao | 6-4,6-1 |
| ITF Portugal F5 Qual | 2018/03/22 13:20 | Tiago Cacao v Christian Lindell | 7-5,3-6,6-3 |
| ITF Portugal F5 | 2018/03/21 12:05 | Johan Nikles v Tiago Cacao | 4-6,4-6 |
| ITF Portugal F4 | 2018/03/12 13:00 | Lamine Ouahab v Tiago Cacao | 6-4,4-6,6-4 |