Stadium: Estadio Round: 46
| Challenger Guadalajara Qual | 2018/04/14 18:00 | Lloyd Glasspool v Cristian Rodriguez | 6-4,6-4 |
| Challenger Le Gosier | 2018/03/27 22:10 | Lloyd Glasspool v Filip Peliwo | 4-6,1-6 |
| ITF USA F8 | 2018/03/20 22:25 | Lloyd Glasspool v Martin Redlicki | 3-6,2-6 |
| ITF USA F7 | 2018/03/17 17:00 | Lloyd Glasspool v Borna Gojo | 3-6,4-6 |
| ITF USA F7 | 2018/03/15 18:50 | Lloyd Glasspool v Evan Song | 7-5,6-3 |
| ITF USA F7 | 2018/03/14 18:00 | Lloyd Glasspool v Harry Bourchier | 6-4,5-7,6-3 |
| ITF Italy F1 | 2018/03/02 15:00 | Lloyd Glasspool v Luca Vanni | 6-3,4-6,4-6 |
| ITF Italy F1 | 2018/02/28 13:55 | Nino Serdarusic v Lloyd Glasspool | 6-7,3-6 |
| Challenger Guadalajara Qual | 2018/04/14 19:05 | Raul-Isaias Rosas-Zarur v Joao Souza | 2-6,0-6 |
| Challenger Mexico City | 2018/04/11 21:05 | Joao Souza v Adrian Menendez-Maceiras | 4-6,6-2,3-6 |
| Challenger Mexico City | 2018/04/10 17:00 | Joao Souza v Guilherme Clezar | 7-6,7-5 |
| Challenger San Luis Potosi | 2018/03/27 18:00 | Daniel Elahi Galan v Joao Souza | 6-7,7-6,7-5 |
| ATP Miami Qual | 2018/03/19 15:35 | Ruben Bemelmans v Joao Souza | 7-5,6-3 |
| Challenger Santiago | 2018/03/06 17:50 | Joao Souza v Carlos Gomez-Herrera | 3-6,1-6 |
| Challenger Santiago Qual | 2018/03/05 14:00 | Joao Souza v Pedro Cachin | 5-7,6-7 |
| Challenger Santiago Qual | 2018/03/04 15:50 | Joao Souza v Victor Nunez | 6-2,6-1 |