Stadium: Court 6 Round: 26 Ground: Clay
| Challenger Salinas 2 | 2021/04/27 18:40 | Shuichi Sekiguchi v Pedro Sakamoto | 2-6,4-6 |
| Challenger Tallahassee | 2021/04/21 20:00 | Pedro Sakamoto v Mikael Torpegaard | 0-6,6-3,1-6 |
| Challenger Tallahassee | 2021/04/19 17:00 | Prajnesh Gunneswaran v Pedro Sakamoto | 2-6,6-2,4-6 |
| Challenger Santiago | 2021/03/16 15:15 | Nicolas Alvarez v Pedro Sakamoto | 3-6,6-4,6-3 |
| ATP Santiago | 2021/03/07 14:00 | Alejandro Tabilo v Pedro Sakamoto | 7-6,6-4 |
| ATP Santiago | 2021/03/06 13:00 | Rafael Matos v Pedro Sakamoto | 3-6,1-6 |
| ATP Buenos Aires | 2021/02/28 14:00 | Pedro Sakamoto v Agustin Velotti | 3-6,4-6 |
| ATP Cordoba | 2021/02/22 17:30 | Facundo Bagnis v Pedro Sakamoto | 6-2,6-4 |
| ITF M15 Novomoskovsk | 2021/05/23 06:00 | Illya Beloborodko v Bruno P Navarro | 2-6,6-2,7-10 |
| ITF M15 St Petersburg | 2021/04/14 07:00 | Illya Beloborodko v Konstantin Kravchuk | 6-4,3-6,2-6 |
| ITF M15 St Petersburg | 2021/04/11 09:00 | Ivan Nedelko v Illya Beloborodko | 2-6,7-5,6-4 |
| ITF M15 St Petersburg | 2021/04/10 08:00 | Jan Satral v Illya Beloborodko | 5-7,3-6 |
| ITF M15 St Petersburg | 2021/04/09 10:50 | Illya Beloborodko v Yanki Erel | 7-6,2-6,6-3 |
| ITF M15 St Petersburg | 2021/04/07 09:55 | Illya Beloborodko v Constantin Bittoun Kouzmine | 6-3,6-1 |
| ITF M15 St Petersburg | 2021/04/04 07:00 | Pavel Shchaya-Zubrov v Illya Beloborodko | 2-6,0-6 |
| ITF M15 Sharm El Sheikh | 2021/03/18 07:30 | Lucas Miedler v Illya Beloborodko | 7-6,6-1 |