Round: 44 Ground: Hardcourt indoor
| ITF Latvia F1 | 2017/07/30 09:00 | Patrik Brydolf v Daniel Soyfer | 6-3,6-2 |
| ITF Estonia F1 | 2017/07/23 07:00 | Igor Rud v Daniel Soyfer | 6-2,6-2 |
| ITF USA F9 Qual | 2016/02/26 15:00 | Tomas Barrios Vera v Daniel Soyfer | 6-4,6-4 |
| ITF Portugal F11 Qual | 2018/07/03 08:30 | Ivan Marrero Curbelo v Roberts Grinvalds | 6-3,6-4 |
| ITF Portugal F11 Qual | 2018/07/02 08:30 | Afonso Cortez v Roberts Grinvalds | 1-6,1-6 |
| ITF Portugal F11 Qual | 2018/06/30 08:30 | Sizya Ernest Kivanda v Roberts Grinvalds | 2-6,6-7 |
| ITF Portugal F9 | 2018/06/18 09:00 | Tiago Cacao v Roberts Grinvalds | 6-1,6-3 |
| 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 |