Stadium: Court 6 Round: 26 Ground: Clay
| Challenger Savannah | 2018/05/01 14:00 | Henri Laaksonen v Enrique Lopez-Perez | 0-6,4-6 |
| Challenger Tallahassee | 2018/04/24 19:35 | Enrique Lopez-Perez v Hugo Dellien | 5-7,2-6 |
| ATP Marrakech Qual | 2018/04/08 12:25 | Enrique Lopez-Perez v Alexey Vatutin | 3-6,2-6 |
| Challenger Alicante | 2018/04/02 14:00 | Enrique Lopez-Perez v Andrea Arnaboldi | 2-6,4-6 |
| Challenger Marbella | 2018/03/28 11:00 | Enrique Lopez-Perez v Stefano Travaglia | 2-6,4-6 |
| Challenger Marbella | 2018/03/26 10:35 | Dustin Brown v Enrique Lopez-Perez | 4-6,2-6 |
| ITF Italy F4 | 2018/03/22 14:30 | Enrique Lopez-Perez v Geronimo E Busleiman | 3-6,5-7 |
| ITF Italy F4 | 2018/03/21 15:35 | Enrique Lopez-Perez v Mateusz Terczynski | 6-1,6-1 |
| Challenger Savannah | 2018/04/30 14:00 | Guilherme Clezar v Dominik Koepfer | 6-2,6-3 |
| Challenger Tallahassee | 2018/04/25 17:00 | Guilherme Clezar v Cristian Garin | 4-6,2-6 |
| Challenger Tallahassee | 2018/04/24 18:55 | Guilherme Clezar v Andrea Arnaboldi | 6-2,6-4 |
| Challenger Sarasota | 2018/04/20 16:00 | Guilherme Clezar v Reilly Opelka | 7-5,4-6,4-6 |
| Challenger Sarasota | 2018/04/19 15:40 | Guilherme Clezar v Evan King | 7-6,3-6,6-2 |
| Challenger Sarasota | 2018/04/17 14:00 | Taro Daniel v Guilherme Clezar | 6-3,2-6,4-6 |
| Challenger Mexico City | 2018/04/10 17:00 | Joao Souza v Guilherme Clezar | 7-6,7-5 |
| Davis Cup | 2018/04/06 21:20 | Daniel Elahi Galan v Guilherme Clezar | 3-6,6-2,6-1 |