Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Spain F14 | 2018/06/06 12:35 | Tiago Cacao v Andre Goransson | 2-6,6-7 |
| ITF Spain F14 | 2018/06/04 14:00 | Francisco Cabral v Tiago Cacao | 2-6,3-6 |
| Challenger Lisbon | 2018/05/14 13:20 | Sebastian Ofner v Tiago Cacao | 6-0,6-3 |
| Challenger Braga | 2018/05/08 09:00 | Tiago Cacao v Alex De Minaur | 6-2,2-6,3-6 |
| ATP Estoril Qual | 2018/04/29 14:25 | Tiago Cacao v Jaume Munar | 5-7,3-6 |
| ITF Portugal F8 | 2018/04/22 11:00 | Tiago Cacao v Frederico Ferreira Silva | 2-6,6-3,3-6 |
| ITF Portugal F8 | 2018/04/21 14:10 | Miliaan Niesten v Tiago Cacao | 4-6,5-7 |
| ITF Portugal F8 | 2018/04/20 12:40 | Joao Monteiro v Tiago Cacao | 4-6,5-7 |
| ITF Portugal F9 | 2018/06/17 11:30 | Goncalo Ferreira v Roberts Grinvalds | 6-3,1-6,2-6 |
| ITF Portugal F9 | 2018/06/16 09:00 | Joao Ferreira v Roberts Grinvalds | 1-6,6-7 |
| Davis Cup | 2018/04/07 08:00 | Roberts Grinvalds v Serafin Zund | 6-0,6-0 |
| Davis Cup | 2018/04/04 07:00 | Roberts Grinvalds v Ioannis Stergiou | 0-6,4-6 |
| ITF Turkey F6 | 2018/02/10 06:00 | Collin Altamirano v Roberts Grinvalds | 6-0,6-3 |
| ITF Turkey F3 | 2018/01/23 11:00 | Maxim Ratniuk v Roberts Grinvalds | 6-3,6-3 |
| ITF Turkey F3 | 2018/01/23 07:30 | Alexandru Danes v Roberts Grinvalds | 3-6,3-6 |
| ITF Turkey F3 | 2018/01/20 09:00 | Nikolaj Katic v Roberts Grinvalds | 0-6,4-6 |