Stadium: Indoor P1 Round: 25 Ground: Hardcourt outdoor
| 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 |
| ITF France F5 | 2018/03/16 14:50 | Igor Sijsling v Hugo Voljacques | 6-2,7-5 |
| ITF France F5 | 2018/03/14 12:00 | Igor Sijsling v Clement Tabur | 7-5,7-5 |
| ITF France F5 | 2018/03/13 12:35 | Igor Sijsling v Damien Bayard | 6-2,6-0 |
| ITF Portugal F6 | 2018/03/29 12:30 | Joao Monteiro v Frederico Ferreira Silva | 6-7,4-6 |
| ITF Portugal F6 | 2018/03/28 11:30 | Joao Monteiro v David Pichler | 7-5,7-6 |
| ITF Portugal F6 | 2018/03/27 14:55 | Joao Monteiro v Maximilian Neuchrist | 7-6,6-4 |
| ITF Portugal F5 | 2018/03/24 15:05 | Joao Monteiro v Lloyd Harris | 3-6,4-6 |
| ITF Portugal F5 | 2018/03/23 10:00 | Joao Monteiro v Tiago Cacao | 6-4,6-1 |
| ITF Portugal F5 | 2018/03/22 16:25 | Joao Monteiro v Kenneth Raisma | 6-4,6-1 |
| ITF Portugal F5 | 2018/03/21 17:15 | Joao Monteiro v Marc Sieber | 5-7,6-3,6-2 |
| Challenger Santiago Qual | 2018/03/04 17:10 | Joao Monteiro v Juan Pablo Ficovich | 2-6,3-6 |