Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
| ITF M15 Haren | 2019/08/30 12:30 | Stefan Seifert v Zachary Eisinga | 5-7,6-3,3-6 |
| ITF M15 Haren | 2019/08/29 10:40 | Kristjan Tamm v Stefan Seifert | 3-6,3-6 |
| ITF M15 Haren | 2019/08/28 09:00 | Stefan Seifert v Alejo Vilaro | 6-1,6-3 |
| ITF M25 Chiswick | 2019/08/09 12:35 | Jurij Rodionov v Stefan Seifert | 6-4,6-4 |
| ITF M25 Chiswick | 2019/08/08 09:00 | Maxime Pauwels v Stefan Seifert | 5-7,2-6 |
| ITF M25 Chiswick | 2019/08/07 09:00 | Stefan Seifert v Francesco Vilardo | 6-3,6-1 |
| ITF M25 Chiswick | 2019/08/05 18:00 | Stefan Seifert v Michael Shaw | 6-2,6-7,10-7 |
| ITF M25 Chiswick | 2019/08/05 11:00 | Stefan Seifert v Alexander Jhun | 6-2,6-0 |
| ITF M15 Haren | 2019/08/30 18:10 | Juan Ignacio Galarza v Ryan Nijboer | 7-5,6-7,7-6 |
| ITF M15 Haren | 2019/08/29 13:10 | Guy Den Heijer v Ryan Nijboer | 3-6,3-6 |
| ITF M15 Haren | 2019/08/28 09:00 | Alexander Mannapov v Ryan Nijboer | 3-6,2-6 |
| ITF M15 Oldenzaal | 2019/08/17 14:35 | Jesper De Jong v Ryan Nijboer | 6-4,1-6,6-4 |
| ITF M15 Oldenzaal | 2019/08/16 09:55 | Colin Van Beem v Ryan Nijboer | 6-7,2-6 |
| ITF M15 Oldenzaal | 2019/08/15 13:50 | Herman Meeuwes Mattheo Knoop v Ryan Nijboer | 3-6,4-6 |
| ITF M15 Oldenzaal | 2019/08/14 11:15 | Tim Van Der Horst v Ryan Nijboer | 2-6,1-6 |
| Challenger Amersfoort | 2019/07/15 16:30 | Ryan Nijboer v Sebastian Fanselow | 4-6,2-6 |