Stadium: Court 9 Round: 25 Ground: Clay
| Challenger Trieste | 2021/07/27 16:00 | Giulio Zeppieri v Pedro Sakamoto | 3-6,6-3,6-3 |
| Challenger Trieste | 2021/07/26 13:30 | Pedro Sakamoto v Hernan Casanova | 6-4,7-6 |
| Challenger Trieste | 2021/07/25 13:05 | Pedro Sakamoto v Francesco Forti | 7-6,6-4 |
| ATP Gstaad | 2021/07/17 14:30 | Enzo Couacaud v Pedro Sakamoto | 6-1,6-3 |
| Challenger Todi | 2021/07/12 14:40 | Flavio Cobolli v Pedro Sakamoto | 3-6,6-4,6-3 |
| ITF M25 Casinalbo | 2021/07/06 14:20 | Pedro Sakamoto v Matteo Arnaldi | 3-6,2-6 |
| 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 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 14:30 | Alan Bojarski v Giacomo Revelli | 3-6,2-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 11:00 | Giacomo Revelli v Michal Wozniak | 6-3,6-2 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 12:45 | Makary Adamek v Giacomo Revelli | 1-6,1-6 |
| ITF M25 Denia | 2021/07/29 08:00 | Giacomo Revelli v Calvin Hemery | 3-6,1-6 |
| ITF M25 Denia | 2021/07/28 11:10 | Giacomo Revelli v Nacho Serra Sanchez | 6-1,7-5 |
| ITF M25 Denia | 2021/07/27 08:00 | Matvey Minin v Giacomo Revelli | 2-6,4-6 |
| UTR Pro Tennis Series Beograd | 2021/07/10 08:30 | Giacomo Revelli v Nikola Slavic | 2-6,4-5 |
| UTR Pro Tennis Series Beograd | 2021/07/08 14:15 | Giacomo Revelli v Alexander Lazov | 4-6,6-1,5-2 |