Stadium: Court 8 (Tamms.) Round: 54 Ground: Hardcourt indoor
| ITF M15 Vilnius | 2019/07/08 07:00 | Terczynski, Mateusz v Grinvalds, Roberts | 7-6,6-2 |
| ITF USA F30 | 2018/11/07 16:45 | Hernandez Serrano, Juan Alejandro v Grinvalds, Roberts | 6-4,6-2 |
| ITF USA F29 | 2018/10/27 16:30 | Grinvalds, Roberts v Timo Stodder | 3-6,6-4,3-6 |
| ITF Latvia F1 | 2018/08/02 10:40 | Slobodchikov, Ronald v Grinvalds, Roberts | 3-6,6-4,6-3 |
| ITF Latvia F1 | 2018/08/01 07:00 | Grinvalds, Roberts v Ivan Liutarevich | 6-1,6-1 |
| ITF Latvia F1 | 2018/07/31 10:00 | Soyfer, Daniel v Grinvalds, Roberts | 6-3,3-6,4-6 |
| ITF Latvia F1 | 2018/07/29 07:00 | Grinvalds, Roberts v Vaise, Tomas | 4-6,6-3,6-4 |
| ITF Latvia F1 | 2018/07/28 07:00 | Grinvalds, Roberts v Abou Khamis, Mohammad Khaled | 6-0,6-0 |
| ITF M15 Parnu | 2019/07/15 08:30 | Kantola, Juho v Hietaranta, Roni Mikael | 2-6,2-6 |
| ITF Finland F4 | 2018/11/13 12:50 | Hietaranta, Roni Mikael v Tyurnev, Evgeny | 6-0,2-6,3-6 |
| ITF Estonia F3 | 2018/11/07 12:05 | Hietaranta, Roni Mikael v Aliaksandr Liaonenka | 4-6,7-6,5-7 |
| ITF Estonia F3 | 2018/11/06 11:00 | Hietaranta, Roni Mikael v Martins Rocens | 6-4,6-4 |
| ITF Finland F3 | 2018/08/13 08:15 | Lorenzo Bocchi v Hietaranta, Roni Mikael | 6-1,6-2 |
| ITF Finland F2 | 2018/08/08 10:05 | Niklas-Salminen, Patrick v Hietaranta, Roni Mikael | 6-3,6-3 |
| ITF Finland F2 Qual | 2018/08/05 10:25 | Hietaranta, Roni Mikael v Sormunen, Jason | 6-2,6-2 |
| ITF Finland F2 Qual | 2018/08/04 10:00 | Saar, Karl Kiur v Hietaranta, Roni Mikael | 4-6,6-1,4-6 |