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 Faivre, Pierre | 6-4,6-2 |
| France F5, Singles | 2018/03/18 14:00 | Antoine Hoang v Igor Sijsling | 3-6,6-1,6-4 |
| France F5, Singles | 2018/03/17 15:15 | Igor Sijsling v Wang, Tak Khunn | 6-1,3-6,6-3 |
| France F5, Singles | 2018/03/16 14:50 | Igor Sijsling v Voljacques, Hugo | 6-2,7-5 |
| France F5, Singles | 2018/03/14 12:00 | Igor Sijsling v Clement Tabur | 7-5,7-5 |
| France F5, Singles | 2018/03/13 12:35 | Igor Sijsling v Bayard, Damien | 6-2,6-0 |
| ITF Portugal F6 | 2018/03/29 12:30 | Monteiro, Joao v Frederico Ferreira Silva | 6-7,4-6 |
| ITF Portugal F6 | 2018/03/28 11:30 | Monteiro, Joao v David Pichler | 7-5,7-6 |
| ITF Portugal F6 | 2018/03/27 14:55 | Monteiro, Joao v Neuchrist, Maximilian | 7-6,6-4 |
| ITF Portugal F5 | 2018/03/24 15:05 | Monteiro, Joao v Lloyd Harris | 3-6,4-6 |
| ITF Portugal F5 | 2018/03/23 10:00 | Monteiro, Joao v Cacao, Tiago | 6-4,6-1 |
| ITF Portugal F5 | 2018/03/22 16:25 | Monteiro, Joao v Kenneth Raisma | 6-4,6-1 |
| ITF Portugal F5 | 2018/03/21 17:15 | Monteiro, Joao v Sieber, Marc | 5-7,6-3,6-2 |
| Challenger Santiago Qual | 2018/03/04 17:10 | Monteiro, Joao v Juan Pablo Ficovich | 2-6,3-6 |