Stadium: Quadra 2 Round: 25 Ground: Clay
| ITF M25 Medellin | 2021/09/18 14:50 | Pedro Sakamoto v Gilbert S K Junior | 3-6,6-7 |
| Challenger Campinas | 2021/11/14 18:10 | Pedro Sakamoto v Bogdan Bobrov | 2-6,4-6 |
| Challenger Ambato | 2021/09/22 18:40 | Pedro Sakamoto v Johan Nikles | 3-6,4-6 |
| Challenger Ambato | 2021/09/21 15:00 | Alejandro Gonzalez v Pedro Sakamoto | 3-6,4-6 |
| ITF M25 Medellin | 2021/09/18 14:50 | Pedro Sakamoto v Gilbert S K Junior | 3-6,6-7 |
| ITF M25 Medellin | 2021/09/17 15:00 | Pedro Sakamoto v Juan A H Serrano | 6-3,6-2 |
| ITF M25 Medellin | 2021/09/16 14:55 | Pedro Sakamoto v Luciano Tacchi | 6-4,6-2 |
| ITF M25 Medellin | 2021/09/15 15:00 | Pedro Sakamoto v Andres Urrea | 6-3,6-3 |
| ITF M25 Medellin | 2021/09/13 20:00 | Pedro Sakamoto v Felipe Hernandez | 6-0,6-0 |
| Challenger Brasilia | 2021/11/24 13:00 | Pedro Cachin v Gilbert S K Junior | 3-6,6-3,7-6 |
| Challenger Brasilia | 2021/11/23 13:00 | Gilbert S K Junior v Alejandro Gomez | 6-3,7-6 |
| Challenger Campinas | 2021/11/16 14:55 | Francisco Cerundolo v Gilbert S K Junior | 6-3,6-0 |
| Challenger Montevideo | 2021/11/07 15:00 | Gilbert S K Junior v Dario Acosta | 6-3,7-5 |
| ITF M25 Rio do Sul | 2021/10/21 14:50 | Gilbert S K Junior v Pedro Boscardin Dias | 6-2,3-6,2-6 |
| ITF M25 Rio do Sul | 2021/10/20 14:45 | Gilbert S K Junior v Mateo Barreiros Reyes | 3-6,6-1,6-2 |
| ITF M25 Lima | 2021/10/17 15:00 | Gilbert S K Junior v Daniel Dutra Da Silva | 7-6,6-3 |
| ITF M25 Lima | 2021/10/16 16:40 | Gilbert S K Junior v Jonathan Mridha | 6-4,6-3 |