Stadium: Court 1 Round: 45 Ground: Clay
| ITF Portugal F8 | 2018/04/17 10:00 | Germain Gigounon v Igor Sijsling | 6-4,6-2 |
| ITF Portugal F7 | 2018/04/12 17:40 | Germain Gigounon v Igor Sijsling | 6-4,6-3 |
| ITF Portugal F7 | 2018/04/12 11:00 | Igor Sijsling v Joao Monteiro | 6-2,6-1 |
| Challenger St Brieuc Qual | 2018/03/26 11:05 | Constant Lestienne v Igor Sijsling | 6-2,5-7,7-6 |
| Challenger St Brieuc Qual | 2018/03/25 11:55 | Igor Sijsling v Zizou Bergs | 7-5,7-5 |
| Challenger St Brieuc Qual | 2018/03/24 17:05 | Igor Sijsling v Pierre Faivre | 6-4,6-2 |
| ITF France F5 | 2018/03/18 14:00 | Antoine Hoang v Igor Sijsling | 3-6,6-1,6-4 |
| ITF France F5 | 2018/03/17 15:15 | Igor Sijsling v Tak Khunn Wang | 6-1,3-6,6-3 |
| Challenger Mexico City | 2018/04/14 22:30 | Roberto Quiroz v Facundo Arguello | 3-6,6-0,6-3 |
| Challenger Mexico City | 2018/04/13 20:40 | Jan Choinski v Facundo Arguello | 5-7,2-6 |
| Challenger Mexico City | 2018/04/12 19:00 | Facundo Arguello v Mats Moraing | 2-6,6-4,6-4 |
| Challenger Mexico City | 2018/04/10 00:35 | Lucas Gomez v Facundo Arguello | 3-6,4-6 |
| Challenger Panama City | 2018/04/02 20:50 | Andrea Collarini v Facundo Arguello | 3-6,6-1,7-6 |
| Challenger San Luis Potosi | 2018/03/28 21:10 | Facundo Arguello v Jose Hernandez-Fernandez | 3-6,3-6 |
| Challenger Santiago | 2018/03/06 16:20 | Facundo Arguello v Thomaz Bellucci | 2-6,3-6 |
| Challenger Santiago Qual | 2018/03/05 14:00 | Hernan Casanova v Facundo Arguello | 2-6,2-6 |