Stadium: Center Court Round: 46
| Challenger Milan Qual | 2018/06/24 13:10 | Jordi Samper-Montana v Joao Souza | 6-0,6-3 |
| Challenger Milan Qual | 2018/06/23 13:35 | Pasquale De Giorgio v Joao Souza | 4-6,2-6 |
| Challenger L'Aquila Qual | 2018/06/17 08:00 | Joao Souza v Riccardo Bonadio | 7-5,6-7,3-6 |
| Challenger Caltanissetta Qual | 2018/06/11 10:15 | Joao Souza v Marc Sieber | 6-2,3-6,4-6 |
| Challenger Caltanissetta Qual | 2018/06/10 12:10 | Joao Souza v Claudio Fortuna | 7-6,6-2 |
| Challenger Caltanissetta Qual | 2018/06/09 12:05 | Joao Souza v Fausto Tabacco | 6-2,6-2 |
| Challenger Guadalajara | 2018/04/17 20:15 | Joao Souza v Gonzalo Escobar | 6-2,3-6,5-7 |
| Challenger Guadalajara Qual | 2018/04/16 17:00 | Alejandro Gonzalez v Joao Souza | 4-6,6-0,3-6 |
| Challenger Braunschweig Qual | 2018/07/07 07:30 | Leonard Von Hindte v Marvin Netuschil | 6-7,2-6 |
| Challenger Marburg Qual | 2018/07/01 09:00 | Tristan Lamasine v Marvin Netuschil | 6-2,3-6,6-0 |
| Challenger Marburg Qual | 2018/06/30 08:00 | Marvin Netuschil v Kimmer Coppejans | 6-4,3-6,6-1 |
| ITF Germany F5 | 2018/06/28 16:35 | Marvin Netuschil v Dimitar Kuzmanov | 3-6,1-6 |
| ITF Germany F5 | 2018/06/27 16:00 | Denis Klok v Marvin Netuschil | 3-6,3-6 |
| ITF Belgium F1 | 2018/06/24 13:00 | Marvin Netuschil v Jaume Pla Malfeito | 6-2,6-3 |
| ITF Belgium F1 | 2018/06/23 14:00 | Marvin Netuschil v Clement Geens | 7-6,6-1 |
| ITF Belgium F1 | 2018/06/22 09:00 | Marvin Netuschil v Kenneth Raisma | 6-4,6-2 |