Stadium: Court 7 Round: 62 Ground: Clay
| ITF M15 Novomoskovsk | 2021/05/30 06:15 | Tommaso Vescovi v Dmitrii Vasilev | 6-7,5-7 |
| ITF M15 Novomoskovsk | 2021/05/23 08:00 | Michal Mikula v Dmitrii Vasilev | 6-1,6-3 |
| ITF M15 Antalya | 2021/05/17 07:00 | Dmitrii Vasilev v Daisuke Sumizawa | 6-7,4-6 |
| ITF M15 Antalya | 2021/05/16 07:00 | Dmitrii Vasilev v Essa Qabazard | 4-6,7-6,10-3 |
| ITF M15 Sharm El Sheikh | 2021/02/21 15:30 | Andres Gabriel Ciurletti v Dmitrii Vasilev | 7-5,6-0 |
| UTR Pro Tennis Series Barcelona | 2021/01/30 09:30 | Francesco Vilardo v Dmitrii Vasilev | 5-7,6-3,0-4 |
| UTR Pro Tennis Series Barcelona | 2021/01/29 13:30 | Dmitrii Vasilev v Alessandro Bega | 3-6,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/01/27 10:30 | Dmitrii Vasilev v Jaime Caldes | 1-6,1-6 |
| ITF M15 Monastir | 2021/05/17 13:30 | Maxence Beauge v Samuele Pieri | 6-2,6-2 |
| ITF M15 Monastir | 2021/05/16 11:00 | Alfredo Casso v Samuele Pieri | 1-6,1-6 |
| ITF M15 Monastir | 2021/05/09 10:00 | Samuele Pieri v Fausto Tabacco | 6-4,5-7,3-10 |
| ITF M15 Monastir | 2021/03/14 10:00 | Yannick Stephan Born v Samuele Pieri | 6-3,3-6,10-7 |
| ITF M15 Monastir | 2021/03/08 12:30 | Samuele Pieri v Luigi Sorrentino | 1-6,2-6 |
| ITF M15 Monastir | 2021/03/07 12:00 | Samuele Pieri v Victor Ernaelsteen | 6-4,6-3 |
| ITF M15 Monastir | 2021/02/28 10:30 | Samuele Pieri v Antonio Campo | 3-6,7-6,3-10 |