Stadium: Court 4 Round: 26 Ground: Clay
| ITF M15 Prague | 2019/05/14 08:00 | Tadeas Paroulek v Colin Sinclair | 6-3,6-2 |
| ITF M15 Troisdorf | 2019/05/07 11:25 | Mick Veldheer v Colin Sinclair | 6-7,6-3,6-2 |
| Challenger Zhangjiagang | 2019/03/18 02:00 | Colin Sinclair v Fajing Sun | 4-6,2-6 |
| Challenger Shenzhen | 2019/03/12 04:20 | Enrique Lopez-Perez v Colin Sinclair | 6-2,6-4 |
| Challenger Shenzhen | 2019/03/11 02:00 | Colin Sinclair v Xinmu Zhou | 6-2,6-4 |
| ITF M25 Mildura | 2019/03/06 23:00 | Rio Noguchi v Colin Sinclair | 6-7,6-2,6-3 |
| ITF M25 Mildura | 2019/03/05 23:00 | Alexander Klintcharov v Colin Sinclair | 4-6,2-6 |
| ITF M25 Albury | 2019/02/27 02:15 | Colin Sinclair v Issei Okamura | 6-7,6-2,4-6 |
| ITF M15 Troisdorf | 2019/05/08 10:30 | Lucas Gerch v Oscar Jose Gutierrez | 3-6,2-6 |
| ITF M15 Troisdorf | 2019/05/07 11:00 | Lucas Gerch v Joel Vincent Link | 6-2,6-2 |
| ITF M25 Shymkent | 2019/04/19 09:30 | Lucas Gerch v Alexander Vasilenko | 3-6,1-6 |
| ITF M25 Shymkent | 2019/04/11 05:00 | Lucas Gerch v Andrey Golubev | 6-3,3-6,4-6 |
| ITF M25 Shymkent | 2019/04/10 12:40 | Lucas Gerch v Matvey Minin | 3-6,6-4,6-4 |
| ITF M15 Sharm El Sheikh | 2019/03/06 11:50 | Lucas Gerch v Albert Roglan | 2-6,3-6 |
| ITF M15 Sharm El Sheikh | 2019/02/28 08:00 | Marco Miceli v Lucas Gerch | 6-3,6-4 |
| ITF M15 Sharm El Sheikh | 2019/02/27 08:00 | Giorgio Ricca v Lucas Gerch | 6-3,5-7,6-7 |