Stadium: Court 4 Round: 28 Ground: Clay
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/05 15:00 | Manuel Guinard v Igor Sijsling | 0-6,2-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/04 16:00 | van Den Berg, Bart v Igor Sijsling | 3-6,2-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/03 13:35 | Hermans, Mats 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 | de Valk, Roy Sarut 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 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/05 09:00 | Zukas, Matias v Michiel de Krom | 6-3,6-1 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/04 13:10 | Karl Friberg v Zukas, Matias | 1-6,1-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/03 08:55 | Zukas, Matias v Max Houkes | 7-5,6-1 |
| ITF M15 Alkmaar | 2019/06/29 11:00 | Niels Lootsma v Zukas, Matias | 4-6,6-4,7-5 |
| ITF M15 Alkmaar | 2019/06/27 10:00 | Zukas, Matias v Guy Den Heijer | 6-2,6-1 |
| ITF M15 Alkmaar | 2019/06/26 08:00 | Zukas, Matias v Matheus P De Almeida | 6-1,6-4 |
| ITF - M25 Toulouse | 2019/06/18 08:30 | Zukas, Matias v Maxime Chazal | 4-6,0-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/11 09:00 | Arreche, Nicolas Alberto v Zukas, Matias | 1-6,6-4,7-5 |