Stadium: Ringi 3 Round: 26 Ground: Hardcourt indoor
| 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 |
| ITF Brazil F4 | 2018/05/20 14:00 | Thiago Seyboth Wild v Joao Lucas Reis da Silva | 7-6,3-6,2-6 |
| ITF Brazil F4 | 2018/05/19 14:00 | Jose Pereira v Joao Lucas Reis da Silva | 2-6,6-3,3-6 |
| ITF Brazil F4 | 2018/05/18 15:00 | Rafael Matos v Joao Lucas Reis da Silva | 3-6,4-6 |
| ITF Estonia F1 | 2018/07/17 10:00 | Roberts Grinvalds v Marc Dijkhuizen | 2-6,1-6 |
| ITF Netherlands F1 Qual | 2018/06/24 09:00 | Marc Dijkhuizen v Paul Barretto | 3-6,2-6 |
| ITF Turkey F22 | 2018/06/05 09:20 | Marc Dijkhuizen v Jonas Trinker | 1-6,3-6 |
| ITF Sweden F3 | 2018/05/21 08:00 | Marc Dijkhuizen v Frederik Press | 1-6,6-3,6-7 |
| ITF Sweden F3 Qual | 2018/05/20 09:00 | Marc Dijkhuizen v Rasmus Johnsson | 6-3,6-1 |
| ITF Sweden F2 | 2018/05/16 10:25 | Marc Dijkhuizen v Gabriel Petit | 3-6,6-4,3-6 |
| ITF Sweden F2 | 2018/05/15 08:30 | Marc Dijkhuizen v Antoine Walch | 6-1,6-2 |
| ITF Turkey F17 | 2018/05/01 13:30 | Robin Thour v Marc Dijkhuizen | 6-4,7-5 |