Stadium: Court 4 Round: 26 Ground: Clay
| 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 Tucson | 2019/02/14 21:30 | Colin Sinclair v Jose Olivares | 3-6,6-7 |
| ITF M15 Tucson | 2019/02/13 18:10 | Colin Sinclair v Luke Jacob Gamble | 7-6,6-0 |
| 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 |
| ITF M15 Sharm El Sheikh | 2019/02/20 11:45 | Matteo Arnaldi v Lucas Gerch | 6-1,6-3 |
| ITF M15 Kaarst | 2019/02/08 12:00 | Igor Sijsling v Lucas Gerch | 6-4,6-4 |
| ITF M15 Kaarst | 2019/02/07 11:00 | Henri Squire v Lucas Gerch | 6-7,5-7 |
| ITF M15 Kaarst | 2019/02/06 17:30 | Martin Van Der Meerschen v Lucas Gerch | 2-6,5-7 |
| ITF M25 Nussloch | 2019/01/24 15:10 | Lucas Gerch v Tim Van Rijthoven | 6-7,4-6 |