Stadium: Cancha 4 Round: 25 Ground: Clay
| Challenger - Campinas | 2017/10/05 16:40 | Gastao Elias v Guilherme Clezar | 6-4,7-6 |
| Challenger - Campinas | 2017/10/03 19:00 | Guilherme Clezar v Christian Lindell | 6-3,6-2 |
| Davis Cup | 2017/09/15 02:00 | Yuichi Sugita v Guilherme Clezar | 6-2,7-5,7-6 |
| Challenger - Quito | 2017/09/01 16:30 | Nicolas Jarry v Guilherme Clezar | 4-6,7-6,6-4 |
| Challenger - Quito | 2017/08/30 17:15 | Roberto Quiroz v Guilherme Clezar | 3-6,7-6,2-6 |
| Challenger - Santo Domingo | 2017/08/16 02:20 | Damir Dzumhur v Guilherme Clezar | 7-6,6-3 |
| Challenger Floridablanca | 2017/08/10 20:55 | Guilherme Clezar v Gonzalo Lama | 6-2,4-6,4-6 |
| Challenger Floridablanca | 2017/08/09 16:00 | Guilherme Clezar v Joao Pedro Sorgi | 6-3,6-4 |
| Challenger - Campinas | 2017/10/04 15:00 | Michael Linzer v Andrej Martin | 2-6,7-5,6-4 |
| Challenger - Campinas | 2017/10/02 18:30 | Michael Linzer v Joao Pedro Sorgi | 4-6,6-4,6-1 |
| Challenger - Bogota | 2017/09/06 15:00 | Gonzalo Escobar v Michael Linzer | 7-6,6-3 |
| Challenger - Quito | 2017/08/30 15:00 | Gerald Melzer v Michael Linzer | 7-6,6-3 |
| Challenger - Quito | 2017/08/28 20:40 | Michael Linzer v Agustin Velotti | 7-6,4-6,6-3 |
| Challenger - Santo Domingo | 2017/08/16 21:45 | Michael Linzer v Nicolas Jarry | 5-7,1-6 |
| Challenger - Santo Domingo | 2017/08/15 17:00 | Michael Linzer v Daniel Elahi Galan | 6-3,4-6,7-5 |
| Challenger Floridablanca | 2017/08/10 17:00 | Michael Linzer v Facundo Arguello | 3-6,4-6 |