Stadium: Court 2 Round: 26 Ground: Hardcourt indoor
| ITF M25 Bolton | 2019/04/03 09:00 | George Houghton v Ryan Nijboer | 7-6,6-7,0-6 |
| ITF - Sharm El Sheikh M15 | 2019/02/27 12:00 | Pedro Vives Marcos v Ryan Nijboer | 7-6,2-6,7-6 |
| ITF - Sharm El Sheikh M15 | 2019/02/22 08:00 | Filip Bergevi v Ryan Nijboer | 3-6,6-4,7-6 |
| ITF - Sharm El Sheikh M15 | 2019/02/19 08:00 | Ryan Nijboer v Agustin Velotti | 4-6,7-5,6-4 |
| ATP Rotterdam | 2019/02/10 12:10 | Ryan Nijboer v Franko Skugor | 6-4,2-6,4-6 |
| ATP Rotterdam | 2019/02/09 14:25 | Jan-Lennard Struff v Ryan Nijboer | 4-6,4-6 |
| Lotto NK Tennis | 2018/12/15 15:30 | Ryan Nijboer v Jelle Sels | 0-6,1-4 |
| Lotto NK Tennis | 2018/12/14 14:00 | Robin Haase v Ryan Nijboer | 6-7,6-2,4-6 |
| ITF M25 Bolton | 2019/04/02 10:20 | William Griffith v Julian Lenz | 0-6,5-7 |
| ITF M25 Kazan | 2019/03/15 07:00 | Savriyan Danilov v Julian Lenz | 6-1,6-2 |
| ITF M25 Kazan | 2019/03/13 10:45 | Alexandar Lazarov v Julian Lenz | 1-6,1-6 |
| ITF - Trento M25 | 2019/03/02 13:00 | Julian Lenz v Jeremy Jahn | 6-7,3-6 |
| ITF - Trento M25 | 2019/03/01 12:30 | Jelle Sels v Julian Lenz | 6-7,1-6 |
| ITF - Trento M25 | 2019/02/28 10:00 | Yannick Mertens v Julian Lenz | 3-6,4-6 |
| ITF - Trento M25 | 2019/02/26 11:40 | Lorenzo Musetti v Julian Lenz | 3-6,7-6,3-6 |
| ITF - Glasgow M25 | 2019/02/19 10:00 | Julian Lenz v Gijs Brouwer | 2-6,2-6 |