Stadium: Court 2 Round: 25 Ground: Clay
| ITF Lithuania F1 | 2018/07/22 08:00 | Mats Hermans v Roberts Grinvalds | 3-6,3-6 |
| ITF Lithuania F1 | 2018/07/21 13:00 | Cristiano Russo v Roberts Grinvalds | 0-6,1-6 |
| ITF Lithuania F1 | 2018/07/21 07:00 | Gustavs Lukstins v Roberts Grinvalds | 5-7,0-6 |
| 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 Estonia F1 | 2018/07/20 10:30 | Joao Lucas Reis da Silva v Dragos Nicolae Madaras | 3-6,2-6 |
| ITF Estonia F1 | 2018/07/20 07:00 | Joao Lucas Reis da Silva v Dragos Nicolae Madaras | 3-6,2-6 |
| ITF Estonia F1 | 2018/07/18 11:00 | Joao Lucas Reis da Silva v Marc Dijkhuizen | 6-2,7-5 |
| ITF Estonia F1 | 2018/07/17 07:00 | Joao Lucas Reis da Silva v Samm Butler | 7-5,7-6 |
| ITF Netherlands F1 | 2018/06/28 12:00 | Benjamin Dhoe v Joao Lucas Reis da Silva | 6-2,6-4 |
| ITF Netherlands F1 | 2018/06/27 13:15 | Bobbie De Goeijen v Joao Lucas Reis da Silva | 5-7,6-7 |
| ITF Belgium F1 | 2018/06/21 10:20 | Joao Lucas Reis da Silva v Jeroen Vanneste | 3-6,6-2,1-6 |
| ITF Belgium F1 | 2018/06/20 08:00 | Yan Sabanin v Joao Lucas Reis da Silva | 4-6,5-7 |