| Davis Cup | 2021/09/18 08:15 | Kareem Allaf v Colin Sinclair | 5-7,7-6,4-6 |
| Davis Cup | 2021/09/17 08:50 | Mousa Shanan Zayed v Colin Sinclair | 1-6,0-6 |
| Davis Cup | 2021/09/15 09:20 | Nam Hoang Ly v Colin Sinclair | 4-6,6-4,4-6 |
| ITF - M25 - Eupen | 2021/09/10 10:55 | Colin Sinclair v Facundo Diaz Acosta | 4-6,5-7 |
| ITF - M25 - Eupen | 2021/09/09 09:25 | Gauthier Onclin v Colin Sinclair | 6-2,2-6,4-6 |
| ITF - M25 - Eupen | 2021/09/08 09:30 | Colin Sinclair v Yan Sabanin | 6-3,7-6 |
| ITF - M25 - Eupen | 2021/09/07 09:45 | Colin Sinclair v Francesco Ferrari | 6-1,6-1 |
| ITF - M25 - Eupen | 2021/09/06 07:30 | Colin Sinclair v Alexander Wolfschmidt | 6-0,6-2 |