Round: 45 Ground: Hardcourt outdoor
| ITF Women Lisbon | 2018/09/16 15:00 | Diana Maria Mihail v Dasha Ivanova | 2-6,2-6 |
| ITF Women Cairo | 2018/09/12 10:00 | Oleksandra Gorchanyuk v Diana Maria Mihail | 7-5,6-7,6-4 |
| ITF Women LPD Gran Canaria Qual | 2018/08/04 16:00 | Jade Suvrijn v Diana Maria Mihail | 6-1,6-2 |
| ITF Women LPD Gran Canaria Qual | 2018/08/04 10:15 | Diana Maria Mihail v Mariana Correa | 7-5,4-6,6-3 |
| WTA Gstaad Qual | 2018/07/14 09:50 | Diana Maria Mihail v Jessica Pieri | 0-6,1-6 |
| ITF Women Hammamet | 2018/06/26 08:30 | Anna Siskova v Diana Maria Mihail | 6-0,6-0 |
| ITF Women Amarante | 2018/06/17 09:00 | Diana Maria Mihail v Natalia Orlova | 3-6,1-6 |
| ITF Women Tbilisi Qual | 2018/04/29 09:30 | Daria Kudashova v Diana Maria Mihail | 6-2,6-1 |