Stadium: Estadio Round: 26 Ground: Hardcourt outdoor
| Challenger Sarasota Qual | 2018/04/14 21:00 | Jan Choinski v Samuel Shropshire | 7-5,3-6,6-3 |
| Challenger Sarasota Qual | 2018/04/14 16:20 | Robert Galloway v Samuel Shropshire | 2-6,2-6 |
| ITF USA F10 | 2018/04/11 18:40 | Sam Riffice v Samuel Shropshire | 6-2,6-0 |
| ITF USA F10 Qual | 2018/04/10 16:40 | Samuel Shropshire v Nevin Arimilli | 7-5,6-2 |
| ITF USA F10 Qual | 2018/04/09 15:00 | Samuel Shropshire v Bradley Holt | 6-1,6-1 |
| ITF USA F9 | 2018/04/04 15:00 | Ronnie Schneider v Samuel Shropshire | 6-3,3-6,6-4 |
| ITF USA F9 Qual | 2018/04/02 17:05 | Francesco Ferrari v Samuel Shropshire | 3-6,7-6,2-6 |
| ITF USA F9 Qual | 2018/04/01 18:00 | Matthew Kandath v Samuel Shropshire | 1-6,2-6 |
| Challenger Puerto Vallarta Qual | 2018/04/29 16:00 | Evan Song v Mauricio Echazu | 4-6,6-1,6-4 |
| Challenger Puerto Vallarta Qual | 2018/04/28 16:00 | Wilfredo Gonzalez v Mauricio Echazu | 3-6,2-6 |
| Challenger Leon Qual | 2018/04/21 16:55 | Felipe Mantilla v Mauricio Echazu | 6-3,7-5 |
| Challenger Mexico City Qual | 2018/04/08 17:50 | Jose Hernandez-Fernandez v Mauricio Echazu | 6-1,6-2 |
| Challenger Panama City Qual | 2018/03/31 14:30 | Mauricio Echazu v Marco Bortolotti | 6-7,2-6 |
| Challenger San Luis Potosi Qual | 2018/03/26 18:00 | Mauricio Echazu v Gonzalo Escobar | 3-6,2-6 |
| Challenger San Luis Potosi Qual | 2018/03/25 22:20 | Rubin Statham v Mauricio Echazu | 6-7,6-2,6-7 |
| Challenger San Luis Potosi Qual | 2018/03/25 16:00 | JA R-Rodriguez v Mauricio Echazu | 6-7,1-6 |