| UTR Pro Tennis Series - Atlanta | 2021/12/03 14:00 | Jake Beasley v Roberts Grinvalds | 6-4,4-6,6-4 |
| UTR Pro Tennis Series - Atlanta | 2021/12/02 20:00 | Diego Padilha v Roberts Grinvalds | 5-7,7-6,7-6 |
| UTR Pro Tennis Series - Atlanta | 2021/11/30 14:00 | Tyler Stice v Roberts Grinvalds | 6-2,6-4 |
| UTR Pro Tennis Series - Atlanta | 2021/11/29 14:00 | Roberts Grinvalds v Jose Antonio Dugo Reyes | 6-1,6-2 |
| ITF - M15 - Parnu | 2019/07/15 13:00 | Roberts Grinvalds v Roni Mikael Hietaranta | 2-6,6-0,7-10 |
| ITF - M15 - Vilnius | 2019/07/08 07:00 | Mateusz Terczynski v Roberts Grinvalds | 7-6,6-2 |
| ITF - USA F30 | 2018/11/07 16:45 | Juan A H Serrano v Roberts Grinvalds | 6-4,6-2 |
| ITF - USA F29 | 2018/10/27 16:30 | Roberts Grinvalds v Timo Stodder | 3-6,6-4,3-6 |
| UTR Pro Tennis Series - Atlanta | 2021/12/03 17:00 | Juan Pablo Cenoz v Joshua Raab | 6-1,2-6,6-4 |
| UTR Pro Tennis Series - Atlanta | 2021/12/02 14:00 | Chris Edge v Joshua Raab | 7-5,6-4 |
| UTR Pro Tennis Series - Atlanta | 2021/12/01 19:39 | David Mizrahi v Joshua Raab | 6-7,6-3,5-3 |
| UTR Pro Tennis Series - Atlanta | 2021/11/29 17:30 | Nicholas Heng v Joshua Raab | 6-3,3-6,7-5 |