Stadium: Court 6 Round: 26 Ground: Hardcourt outdoor
| 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 |
| ITF USA F19 MD | 2018/07/06 23:00 | Johnson/Johnson v Cressy/Holt | 6-3,2-6,6-10 |
| ITF USA F19 MD | 2018/07/06 01:00 | Johnson/Johnson v Kessler/Kozlov | 6-3,7-6 |
| ITF USA F19 MD | 2018/07/04 19:10 | Johnson/Johnson v Peniston/Woog | 6-1,3-6,10-7 |