Stadium: TK PALILULA C3 Round: 25 Ground: Clay
| UTR Pro Tennis Series Boekarest | 2021/05/23 07:00 | Nicolae Frunza v Colin Sinclair | 5-6 |
| UTR Pro Tennis Series Boekarest | 2021/05/22 12:30 | Ilya Snitari v Colin Sinclair | 6-4,6-7,6-7 |
| UTR Pro Tennis Series Boekarest | 2021/05/22 07:00 | Colin Sinclair v Simon Beaupain | 6-3,6-4 |
| UTR Pro Tennis Series Boekarest | 2021/05/19 10:00 | Colin Sinclair v Juan Ignacio Galarza | 4-6,2-6 |
| UTR Pro Tennis Series Boekarest | 2021/05/18 10:00 | Colin Sinclair v Tomas Lipovsek Puches | 6-2,5-1 |
| UTR Pro Tennis Series Boekarest | 2021/05/17 12:30 | Nicholas David Ionel v Colin Sinclair | 6-7,4-5 |
| ITF - M15 Antalya | 2021/05/10 07:00 | Colin Sinclair v Thomas Deschamps | 6-7,6-2,7-10 |
| ITF - M15 Antalya | 2021/05/09 07:00 | Colin Sinclair v Farzin Danny Amiri | 6-3,6-2 |
| ITF - M15 Bergamo | 2021/06/24 14:35 | Luca Nardi v Edoardo Eremin | 6-4,6-2 |
| ITF - M15 Bergamo | 2021/06/23 07:30 | Danylo Kalenichenko v Edoardo Eremin | 1-6,4-6 |
| ITF M15 - Genova | 2021/06/19 15:00 | Edoardo Eremin v Johan Nikles | 2-6,3-6 |
| ITF M15 - Genova | 2021/06/18 19:35 | Edoardo Eremin v Davide Galoppini | 6-3,6-4 |
| ITF M15 - Genova | 2021/06/17 09:45 | Edoardo Eremin v Federico Arnaboldi | 6-1,6-3 |
| ITF M15 - Genova | 2021/06/16 12:35 | Julian Ocleppo v Edoardo Eremin | 1-6,4-6 |
| ITF - M15 Antalya | 2021/05/20 07:30 | Edoardo Eremin v Francesco Forti | 7-6,5-7,5-7 |
| ITF - M15 Antalya | 2021/05/19 11:10 | Vladimir Ivanov v Edoardo Eremin | 3-6,4-6 |