Round: 26 Ground: Clay
| Challenger San Luis Potosi | 2015/04/01 21:10 | Connor Smith v Guilherme Clezar | 2-6,5-7 |
| ATP Buenos Aires Qual | 2015/02/21 18:00 | Juan Ignacio Iliev v Guilherme Clezar | 1-6,0-6 |
| 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 |
| Challenger Campinas | 2014/09/17 20:45 | Nicolas Santos v Guilherme Clezar | 1-6,0-6 |
| Challenger Campinas | 2014/09/15 22:30 | Gonzalo Lama v Guilherme Clezar | 4-6,1-6 |
| Challenger San Luis Potosi | 2015/04/01 16:30 | James McGee v Damir Dzumhur | 7-5,6-3 |
| Challenger Dallas | 2015/02/04 00:10 | Tim Smyczek v James McGee | 3-6,6-4,7-5 |
| Challenger Knoxville | 2014/11/06 17:20 | James McGee v Adrian Mannarino | 3-6,2-6 |
| Challenger Knoxville | 2014/11/05 19:10 | Marcelo Arevalo v James McGee | 3-6,2-6 |
| Challenger Charlottesville | 2014/10/28 14:00 | Tennys Sandgren v James McGee | 6-3,6-1 |
| Challenger Tiburon | 2014/10/10 22:50 | Sam Querrey v James McGee | 6-1,7-5 |
| Challenger Tiburon | 2014/10/08 22:00 | James McGee v Jordan Thompson | 7-6,6-3 |
| Challenger Tiburon | 2014/10/06 19:40 | Kyle Edmund v James McGee | 6-3,3-6,3-6 |