Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| Challenger Lisbon Qual | 2018/05/12 13:35 | Christopher Heyman v David Vega Hernandez | 1-6,3-6 |
| Challenger Braga | 2018/05/08 17:25 | Pedro Sousa v Christopher Heyman | 6-2,6-2 |
| Challenger Guadalajara | 2018/04/17 17:00 | Christopher Heyman v Alexander Sarkissian | 4-6,6-7 |
| Challenger Mexico City | 2018/04/09 22:25 | Christopher Heyman v Adrian Menendez-Maceiras | 6-1,5-7,2-6 |
| ITF Portugal F6 | 2018/03/29 11:00 | Andres Artunedo Martinavarr v Christopher Heyman | 6-2,6-1 |
| ITF Portugal F6 | 2018/03/28 14:45 | Jaime Pulgar-Garcia v Christopher Heyman | 3-6,2-6 |
| ITF Portugal F6 | 2018/03/27 15:20 | Kenneth Raisma v Christopher Heyman | 4-6,7-6,6-7 |
| ITF Switzerland F2 | 2018/02/14 14:00 | Christopher Heyman v Niels Desein | 6-7,4-6 |
| ITF Egypt F17 | 2018/05/11 09:35 | Neven Krivokuca v Ronald Slobodchikov | 3-6,5-7 |
| ITF Egypt F17 | 2018/05/10 11:10 | Neven Krivokuca v Vladislav Dubinsky | 6-1,6-1 |
| ITF Egypt F17 | 2018/05/09 09:25 | Alexander Igoshin v Neven Krivokuca | 4-6,6-4,3-6 |
| ITF Egypt F16 | 2018/05/03 07:30 | Neven Krivokuca v Pol Toledo Bague | 4-6,2-6 |
| ITF Egypt F16 | 2018/05/01 07:30 | Issam Haitham Taweel v Neven Krivokuca | 3-6,0-6 |
| ITF Egypt F15 | 2018/04/25 09:20 | Petr Hajek v Neven Krivokuca | 6-4,6-4 |
| ITF Croatia F3 | 2018/03/18 16:00 | Neven Krivokuca v Giuseppe Tresca | 6-1,6-2 |
| ITF Turkey F10 | 2018/03/13 08:55 | Neven Krivokuca v Andrey Chepelev | 2-6,3-6 |