Round: 25 Ground: Clay
| ATP Houston Qual | 2015/04/05 16:00 | Facundo Bagnis v Guilherme Clezar | 2-6,6-7 |
| ATP Houston Qual | 2015/04/04 15:00 | Guilherme Clezar v Sekou Bangoura | 7-6,7-6 |
| Challenger - San Luis Potosi | 2015/04/02 20:10 | Guilherme Clezar v James McGee | 3-6,6-2,6-7 |
| Challenger - San Luis Potosi | 2015/04/01 21:10 | Connor Smith v Guilherme Clezar | 2-6,5-7 |
| Challenger - Guayaquil | 2014/11/12 01:40 | Renzo Olivo v Guilherme Clezar | 3-6,6-3,6-3 |
| Challenger Cali 2 | 2014/10/01 17:00 | Alejandro Gonzalez v Guilherme Clezar | 4-6,6-3,6-1 |
| Challenger Cali 2 | 2014/09/30 19:25 | Agustin Velotti v Guilherme Clezar | 2-6,2-6 |
| Challenger - Campinas | 2014/09/19 15:00 | Diego Schwartzman v Guilherme Clezar | 6-3,7-6 |