| UTR Pro Tennis Series Bucharest | 2021/06/03 07:30 | Marcelo Zormann v Warren Sinius | 6-0,6-0 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 12:00 | Ihor Dudun v Warren Sinius | 4-6,0-6 |
| UTR Pro Tennis Series Bucharest | 2021/05/30 13:00 | Mihai Razvan Marinescu v Warren Sinius | 6-4,6-1 |
| ITF M15 Marbella | 2021/05/23 12:30 | Jose Dominguez Alonso v Warren Sinius | 6-2,2-6,10-6 |
| UTR Pro Tennis Series Barcelona | 2021/05/01 11:00 | Warren Sinius v Fermin Calvo Barcelo | 0-6,0-5 |
| UTR Pro Tennis Series Barcelona | 2021/04/30 12:30 | Kuzey Cekirge v Warren Sinius | 5-7,6-0,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/04/29 10:00 | Thomas Laurent v Warren Sinius | 6-1,5-1 |
| ITF M15 Poitiers | 2021/03/15 11:10 | Warren Sinius v Hugo Voljacques | 0-6,0-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 12:00 | Vlad Andrei Dancu v Valentin Vanta | 7-5,6-3 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 06:00 | Kuzey Cekirge v Valentin Vanta | 6-3,7-5 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 13:00 | Valentin Vanta v Samuil Konov | 4-6,6-2,6-2 |
| ITF M15 Bucharest | 2021/05/24 09:30 | Jaimee Floyd Angele v Valentin Vanta | 6-3,6-3 |
| ITF M15 Antalya | 2021/05/12 09:00 | Sandro Kopp v Valentin Vanta | 6-7,6-1,6-2 |
| ITF M15 Antalya | 2021/05/11 07:00 | Valentin Vanta v Cezar Cretu | 7-5,6-1 |
| ITF M15 Antalya | 2021/05/10 07:00 | Karl Friberg v Valentin Vanta | 3-6,6-7 |
| ITF M15 Antalya | 2021/05/09 07:00 | Robin Thour v Valentin Vanta | 7-5,3-6,7-10 |