Stadium: Stadium Round: 25 Ground: Hardcourt outdoor
| WTA Quebec City | 2018/09/11 17:10 | Kristie Ahn v Olga Govortsova | 1-6,4-6 |
| WTA Chicago | 2018/09/06 15:00 | Kristie Ahn v Dayana Yastremska | 6-7,4-6 |
| WTA Chicago | 2018/09/05 15:00 | Eugenie Bouchard v Kristie Ahn | 6-7,4-6 |
| WTA Chicago | 2018/09/03 22:40 | Kristie Ahn v Quinn Gleason | 2-6,6-4,7-5 |
| WTA Chicago | 2018/09/02 20:30 | Kristie Ahn v Michaela Gordon | 6-0,6-2 |
| US Open Women | 2018/08/23 16:40 | Ons Jabeur v Kristie Ahn | 6-1,6-2 |
| US Open Women | 2018/08/21 19:50 | Kristie Ahn v Katarina Zavatska | 6-4,6-3 |
| ITF Women Landisville | 2018/08/11 16:45 | Jessica Pegula v Kristie Ahn | 7-6,6-7,4-6 |
| WTA Chicago | 2018/09/02 15:00 | Robin Anderson v Maria Sanchez | 5-7,6-3,6-2 |
| WTA New Haven Qual | 2018/08/17 20:30 | Tamara Zidansek v Maria Sanchez | 7-5,7-6 |
| ITF Women Landisville Qual | 2018/08/06 14:00 | Maria Sanchez v Eri Hozumi | 5-7,5-7 |
| ITF Women Landisville Qual | 2018/08/05 16:20 | Nika Kukharchuk v Maria Sanchez | 5-7,3-6 |
| WTA San Jose Qual | 2018/07/29 19:45 | Maria Sanchez v Georgina Garcia-Perez | 6-7,6-7 |
| WTA San Jose Qual | 2018/07/28 19:35 | Aryna Sabalenka v Maria Sanchez | 6-2,5-7,4-6 |
| ITF Women Granby | 2018/07/25 14:00 | Rebecca Marino v Maria Sanchez | 4-6,6-4,6-1 |
| ITF Women Granby | 2018/07/24 19:00 | Cristiana Ferrando v Maria Sanchez | 2-6,5-7 |