| 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 |
| ITF Estonia F4 | 2017/11/04 14:00 | Daniil Glinka v Roberts Grinvalds | 6-7,6-4,6-3 |
| ITF Estonia F3 | 2017/10/28 09:30 | Pavel Filin v Roberts Grinvalds | 6-3,6-1 |
| ITF Estonia F2 | 2017/10/21 11:00 | Isaac Stoute v Roberts Grinvalds | 7-6,4-6,6-2 |
| ITF Spain F7 | 2018/03/16 09:30 | Juan P Canas Garcia v Serafin Zund | 6-0,6-1 |