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