Stadium: Cancha 1 Round: 25 Ground: Clay
| ITF M25 Lima | 2021/10/05 15:00 | Pol Martin Tiffon v March, Antonio Cayetano | 6-2,6-2 |
| Ambato, Ecuador | 2021/09/21 15:00 | Gomez, Alejandro v March, Antonio Cayetano | 6-3,6-4 |
| Challenger Quito | 2021/09/13 17:10 | Perchicot, Mathieu v March, Antonio Cayetano | 6-4,6-0 |
| ITF M15 Ulcinj | 2021/09/03 09:00 | March, Antonio Cayetano v Juan Pablo Paz | 1-6,6-4,3-6 |
| ITF M15 Ulcinj | 2021/09/02 08:30 | March, Antonio Cayetano v Aristotelis Thanos | 7-6,6-4 |
| ITF M15 Ulcinj | 2021/09/01 13:30 | March, Antonio Cayetano v Ivanov, Simon Anthony | 7-6,6-1 |
| ITF M15 Huy | 2021/08/27 13:00 | Gauthier Onclin v March, Antonio Cayetano | 6-3,6-2 |
| ITF M15 Huy | 2021/08/26 09:00 | March, Antonio Cayetano v Simon Beaupain | 6-7,6-4,6-2 |
| Challenger - Santiago | 2021/10/03 19:50 | Soares Klier, Gilbert v Gomez-Herrera, Carlos | 6-3,2-6,3-6 |
| ITF M25 Medellin | 2021/09/19 15:00 | Soares Klier, Gilbert v Joao Lucas Reis da Silva | 6-2,6-2 |
| ITF M25 Medellin | 2021/09/18 14:50 | Pedro Sakamoto v Soares Klier, Gilbert | 3-6,6-7 |
| ITF M25 Medellin | 2021/09/17 15:00 | Soares Klier, Gilbert v Kohen, Alan | 6-2,4-6,6-1 |
| ITF M25 Medellin | 2021/09/16 15:00 | Soares Klier, Gilbert v Gomez, Mateo | 6-3,6-3 |
| ITF M25 Medellin | 2021/09/14 18:05 | Soares Klier, Gilbert v Enrique Bogo | 6-1,6-2 |
| ITF M25 Poznan | 2021/08/25 10:00 | Harry Wendelken v Soares Klier, Gilbert | 3-6,6-4,6-2 |
| ITF M15 Lodz | 2021/08/21 08:00 | Soares Klier, Gilbert v Maciej Rajski | 4-6,6-7 |