Stadium: Court 1 Round: 27 Ground: Clay
| ITF M15 Alkmaar | 2019/06/27 10:00 | Niels Lootsma v Roland Stuurman | 6-4,6-2 |
| ITF M15 Alkmaar | 2019/06/25 11:00 | Niels Lootsma v Yanais Laurent | 6-4,6-4 |
| ITF M15 Prague | 2019/05/15 08:00 | Konecny, Michal v Niels Lootsma | 4-6,7-6,6-2 |
| Abuja, Singles Qualifying M-ITF-NGR-02A | 2019/04/27 09:00 | Niels Lootsma v Dan Added | 5-7,4-6 |
| Abuja, Singles Qualifying M-ITF-NGR-02A | 2019/04/26 09:00 | Niels Lootsma v Soares Klier, Gilbert | 6-7,6-3,6-3 |
| Abuja, Singles Qualifying M-ITF-NGR-02A | 2019/04/25 09:00 | Niels Lootsma v Gamble, Luke Jacob | 6-4,7-5 |
| Abuja, Singles Qualifying M-ITF-NGR-02A | 2019/04/24 10:20 | Niels Lootsma v Arvid Nordquist | 6-4,7-5 |
| Abuja, Singles Qualifying M-ITF-NGR-02A | 2019/04/17 13:10 | Niels Lootsma v Doumbia, Sadio | 6-4,6-4 |
| ITF M15 Alkmaar | 2019/06/27 12:25 | Gelhardt, Luca v Colin Sinclair | 6-7,3-6 |
| ITF M15 Alkmaar | 2019/06/26 09:25 | Charles Broom v Colin Sinclair | 3-6,6-4,1-6 |
| Huelva, Singles Qualifying M-ITF-ESP-12A | 2019/06/13 10:00 | Juan Pablo Varillas v Colin Sinclair | 6-0,6-4 |
| Huelva, Singles Qualifying M-ITF-ESP-12A | 2019/06/11 18:00 | Nicolas Alvarez Varona v Colin Sinclair | 7-6,4-6,2-6 |
| Karlsruhe, Singles M-ITF-GER-04A | 2019/06/07 15:55 | Colin Sinclair v Netuschil, Marvin | 4-6,2-6 |
| Karlsruhe, Singles M-ITF-GER-04A | 2019/06/05 11:10 | Adrian Oetzbach v Colin Sinclair | 6-3,3-6,4-6 |
| ITF M25 Most | 2019/06/01 08:00 | Colin Sinclair v Satral, Jan | 6-3,2-6,3-6 |
| ITF M25 Most | 2019/05/31 08:00 | Colin Sinclair v Krstev, Ondrej | 6-2,6-3 |