Round: 62 Ground: Clay
| ITF Estonia F1 | 2018/07/14 08:00 | Gustavs Lukstins v Rudolfs Mednis | 6-7,2-6 |
| ITF Belgium F3 Qual | 2018/07/01 12:00 | Gustavs Lukstins v Sam Taylor | 6-7,2-6 |
| ITF Turkey F6 | 2018/02/10 09:00 | Gustavs Lukstins v Ryuki Matsuda | 0-6,1-6 |
| ITF Turkey F3 | 2018/01/22 10:00 | Muhammet Haylaz v Gustavs Lukstins | 6-1,7-5 |
| ITF Turkey F3 | 2018/01/20 07:00 | Gustavs Lukstins v Amir Hossein Badi | 6-3,2-6,6-2 |
| ITF Estonia F4 | 2017/11/04 11:00 | Riccardo Maiga v Gustavs Lukstins | 7-5,6-2 |
| ITF Estonia F2 | 2017/10/21 08:00 | Pavel Filin v Gustavs Lukstins | 6-2,3-6,6-2 |
| ITF Turkey F33 | 2017/09/02 11:00 | Gustavs Lukstins v Nicolas Uryson | 6-3,2-6,2-6 |
| ITF Estonia F1 | 2018/07/17 10:00 | Roberts Grinvalds v Marc Dijkhuizen | 2-6,1-6 |
| ITF Estonia F1 | 2018/07/16 07:00 | Daniel Soyfer v Roberts Grinvalds | 3-6,3-6 |
| ITF Estonia F1 | 2018/07/16 07:00 | Christoffer Solberg v Roberts Grinvalds | 6-7,7-6,5-7 |
| 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 |