Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Challenger Vancouver MD | 2018/08/16 01:50 | Erlich/Qureshi v Johnson/Johnson | 6-3,7-6 |
| Challenger Aptos MD | 2018/08/06 22:00 | Nedunchezhiyan/Raja v Johnson/Johnson | 6-2,6-4 |
| Challenger Lexington MD | 2018/07/30 19:45 | Johnson/Johnson v Harris/Purcell | 4-6,6-3,6-10 |
| Challenger Binghamton MD | 2018/07/27 16:00 | Johnson/Johnson v Galloway/Maytin | 4-6,4-6 |
| Challenger Gatineau MD | 2018/07/18 19:00 | Mousley/Reid v Johnson/Johnson | 6-3,6-7,10-3 |
| Challenger Gatineau MD | 2018/07/16 20:00 | Johnson/Johnson v Escoffier/Humbert | 6-4,3-6,11-9 |
| Challenger Winnetka MD | 2018/07/12 22:00 | Krajicek/Nedunchezhiyan v Johnson/Johnson | 6-4,6-2 |
| Challenger Winnetka MD | 2018/07/11 00:00 | Redlicki/Redlicki v Johnson/Johnson | 6-7,6-7 |