Stadium: Cancha 3 Round: 25 Ground: Clay
| Challenger - Lima | 2021/09/29 17:05 | Matheus P De Almeida v Johan Nikles | 6-7,4-6 |
| Challenger - Lima | 2021/09/27 20:15 | Francisco Cerundolo v Matheus P De Almeida | 2-6,4-6 |
| Challenger Kyiv | 2021/09/08 08:00 | Matheus P De Almeida v Nuno Borges | 6-2,2-6,5-7 |
| Challenger Kyiv | 2021/09/06 11:35 | Matheus P De Almeida v Michael Vrbensky | 6-3,6-2 |
| Challenger Como | 2021/08/30 09:00 | Matheus P De Almeida v Lucas Miedler | 7-6,4-6,2-6 |
| Challenger Como | 2021/08/29 10:00 | Geoffrey Blancaneaux v Matheus P De Almeida | 4-6,2-6 |
| Challenger - Prague | 2021/08/23 13:40 | Filip Cristian Jianu v Matheus P De Almeida | 6-7,2-6 |
| Challenger Verona | 2021/08/18 13:00 | Holger Rune v Matheus P De Almeida | 6-2,6-3 |
| Challenger - Santiago | 2021/10/04 14:00 | Alexis Gautier v Perchicot, Mathieu | 6-2,6-7,6-0 |
| Challenger - Santiago | 2021/10/03 14:00 | Alexis Gautier v Matos, Rafael | 6-3,6-2 |
| Challenger - Lima | 2021/09/26 19:50 | Alexis Gautier v Barrientos, Nicolas | 0-6,0-6 |
| Ambato, Ecuador | 2021/09/24 16:00 | Facundo Mena v Alexis Gautier | 7-6,6-4 |
| Ambato, Ecuador | 2021/09/23 15:00 | Alexis Gautier v Andrej Martin | 6-3,7-6 |
| Ambato, Ecuador | 2021/09/22 15:00 | Alexis Gautier v Gonzalo Lama | 6-4,6-7,6-3 |
| Ambato, Ecuador | 2021/09/20 16:55 | Alexis Gautier v Gomez, Alejandro | 6-7,4-6 |
| Ambato, Ecuador | 2021/09/19 19:00 | Alexis Gautier v Merino, Alexander | 6-3,6-1 |