Stadium: Wisla Centrum 2 Round: 25 Ground: Clay
| ITF Poland F1 | 2018/04/30 07:00 | Robert Strombachs v Jannik Sinner | 7-5,7-6 |
| ITF Poland F1 | 2018/04/29 07:00 | Ivan Yatsuk v Robert Strombachs | 2-6,4-6 |
| ITF Poland F1 | 2018/04/28 07:00 | Mikhail Minakov v Robert Strombachs | 0-6,1-6 |
| ITF Greece F5 | 2018/03/25 08:00 | Mitchell Thomas McDaniels v Robert Strombachs | 7-5,6-4 |
| ITF Greece F5 | 2018/03/24 10:00 | Robert Strombachs v Daniel De Jonge | 6-3,6-4 |
| ITF Greece F4 | 2018/03/21 08:00 | Riccardo Balzerani v Robert Strombachs | 6-2,6-2 |
| ITF Greece F4 | 2018/03/19 08:00 | Robert Strombachs v Kristjan Tamm | 6-4,6-7,6-0 |
| ITF Greece F4 | 2018/03/17 07:30 | Yates Johnson v Robert Strombachs | 3-6,1-6 |
| ITF Portugal F8 | 2018/04/18 12:00 | Pedro Gabriel Rodrigues v Dan Dowson | 7-5,3-6,1-6 |
| ITF Portugal F8 Qual | 2018/04/16 14:55 | Marc Fornell-Mestres v Dan Dowson | 2-6,0-6 |
| ITF Portugal F8 Qual | 2018/04/14 13:30 | Dan Dowson v Laelson Rodrigues | 6-4,6-2 |
| ITF Portugal F7 Qual | 2018/04/10 08:00 | Dan Dowson v Philipp Davydenko | 2-6,4-6 |
| ITF Portugal F7 Qual | 2018/04/09 08:00 | Omar Salman v Dan Dowson | 3-6,6-7 |
| ITF Portugal F7 Qual | 2018/04/08 12:00 | Dan Dowson v Russell Henderson | 6-4,6-0 |
| ITF Tunisia F12 | 2018/03/28 14:00 | Mariano Kestelboim v Dan Dowson | 6-3,6-0 |
| ITF Tunisia F11 | 2018/03/20 08:30 | Lucas Catarina v Dan Dowson | 6-3,6-3 |