Stadium: Estadio CIF Round: 64 Ground: Clay
| Challenger Monterrey | 2020/03/05 20:30 | Guilherme Clezar v Kevin King | 6-7,6-4,4-6 |
| Challenger Monterrey | 2020/03/04 17:00 | Federico Coria v Guilherme Clezar | 1-6,7-6,6-7 |
| Challenger Monterrey | 2020/03/02 20:00 | Nicolas Mejia v Guilherme Clezar | 1-6,4-6 |
| Challenger Columbus | 2020/02/27 18:45 | Guilherme Clezar v Denis Istomin | 3-6,1-6 |
| Challenger Columbus | 2020/02/26 15:00 | Jason Kubler v Guilherme Clezar | 6-2,6-7,4-6 |
| Challenger Columbus | 2020/02/25 15:00 | Justin Boulais v Guilherme Clezar | 4-6,2-6 |
| Challenger Morelos | 2020/02/22 22:00 | Guilherme Clezar v Jurij Rodionov | 6-3,2-6,4-6 |
| Challenger Morelos | 2020/02/21 19:00 | Daniel Altmaier v Guilherme Clezar | 6-3,6-7,4-6 |
| FPT Portugal Series | 2020/07/18 13:30 | Nuno Borges v Joao Monteiro | 4-6,6-3,5-4 |
| FPT Portugal Series | 2020/07/17 12:00 | Joao Monteiro v Gastao Elias | 6-2,6-5 |
| FPT Portugal Series | 2020/07/16 15:00 | Joao Monteiro v Duarte Vale | 6-7,7-6,6-3 |
| FPT Portugal Series | 2020/07/10 16:00 | Frederico Ferreira Silva v Joao Monteiro | 6-0,6-2 |
| FPT Portugal Series | 2020/07/08 12:30 | Joao Monteiro v Fabio Coelho | 6-2,6-3 |
| FPT Portugal Series | 2020/07/03 15:00 | Joao Monteiro v Joao Sousa | 4-6,2-5 |
| FPT Portugal Series | 2020/07/01 12:30 | Tiago Torres v Joao Monteiro | 3-6,4-6 |
| FPT Portugal Series | 2020/06/26 15:00 | Joao Monteiro v Gastao Elias | 1-6,2-5 |