| ITF M25 Sunderland | 2020/03/01 12:40 | Jack Draper v Igor Sijsling | 6-2,6-0 |
| ITF M25 Sunderland | 2020/02/29 10:25 | Igor Sijsling v Jesper De Jong | 6-2,1-6,6-2 |
| ITF M25 Sunderland | 2020/02/28 10:00 | Mark Whitehouse v Igor Sijsling | 5-7,5-7 |
| ITF M25 Sunderland | 2020/02/27 10:00 | Aidan Mchugh v Igor Sijsling | 2-6,5-7 |
| ITF M25 Sunderland | 2020/02/25 11:30 | Evan Hoyt v Igor Sijsling | 2-6,5-7 |
| Challenger Koblenz | 2020/02/18 09:00 | Kacper Zuk v Igor Sijsling | 6-4,3-6,6-7 |
| ITF M25 Nussloch | 2020/01/21 13:30 | Vitaliy Sachko v Igor Sijsling | 7-6,6-2 |
| ITF M15 Antalya | 2019/12/19 09:20 | Benjamin Dhoe v Igor Sijsling | 6-3,6-4 |