Stadium: Court 4 Round: 28 Ground: Clay
| ITF M15 Den Haag | 2019/07/05 15:00 | Manuel Guinard v Igor Sijsling | 0-6,2-6 |
| ITF M15 Den Haag | 2019/07/04 16:00 | Bart Van Den Berg v Igor Sijsling | 3-6,2-6 |
| ITF M15 Den Haag | 2019/07/03 13:35 | Mats Hermans v Igor Sijsling | 2-6,1-6 |
| ITF - M15 Alkmaar | 2019/06/28 14:35 | Jesper De Jong v Igor Sijsling | 7-6,3-6,6-4 |
| ITF - M15 Alkmaar | 2019/06/27 15:15 | Michiel de Krom v Igor Sijsling | 3-6,3-6 |
| ITF - M15 Alkmaar | 2019/06/26 11:00 | Roy Sarut De Valk v Igor Sijsling | 6-4,1-6,2-6 |
| ITF M25 Doboj | 2019/05/18 08:00 | Igor Sijsling v Botic Van De Zandschulp | 6-4,4-6,3-6 |
| ITF M25 Doboj | 2019/05/17 08:00 | Igor Sijsling v Milan Drinic | 1-6,6-2,6-3 |
| ITF M15 Den Haag | 2019/07/05 09:00 | Matias Zukas v Michiel de Krom | 6-3,6-1 |
| ITF M15 Den Haag | 2019/07/04 13:10 | Karl Friberg v Matias Zukas | 1-6,1-6 |
| ITF M15 Den Haag | 2019/07/03 08:55 | Matias Zukas v Max Houkes | 7-5,6-1 |
| ITF - M15 Alkmaar | 2019/06/29 11:00 | Niels Lootsma v Matias Zukas | 4-6,6-4,7-5 |
| ITF - M15 Alkmaar | 2019/06/27 10:00 | Matias Zukas v Guy Den Heijer | 6-2,6-1 |
| ITF - M15 Alkmaar | 2019/06/26 08:00 | Matias Zukas v Matheus P De Almeida | 6-1,6-4 |
| ITF - M25 Toulouse | 2019/06/18 08:30 | Matias Zukas v Maxime Chazal | 4-6,0-6 |
| ITF M15 Tabarka | 2019/06/11 09:00 | Nicolas Alberto Arreche v Matias Zukas | 1-6,6-4,7-5 |