Stadium: Central Round: 26
| ITF Women Montreux | 2018/09/05 11:05 | Duque Marino, Mariana v Chiara Scholl | 6-1,6-1 |
| US Open Women | 2018/08/21 19:30 | Duque Marino, Mariana v Arina Rodionova | 5-7,5-7 |
| WTA Bucharest | 2018/07/16 11:00 | Duque Marino, Mariana v Arantxa Rus | 2-6,4-6 |
| ITF Women Budapest | 2018/07/11 14:30 | Dalma Galfi v Duque Marino, Mariana | 5-7,7-5,6-4 |
| Wimbledon Women | 2018/07/03 16:10 | Alison Riske v Duque Marino, Mariana | 6-1,6-1 |
| Wimbledon Women Qual | 2018/06/28 11:40 | Duque Marino, Mariana v Eugenie Bouchard | 3-6,2-6 |
| Wimbledon Women Qual | 2018/06/27 11:15 | Duque Marino, Mariana v Hogenkamp, Richel | 6-4,6-1 |
| Wimbledon Women Qual | 2018/06/26 10:00 | Duque Marino, Mariana v Renata Zarazua | 6-4,6-0 |
| ITF Women Montreux | 2018/09/05 10:35 | Stephanie Wagner v Isabella Shinikova | 6-4,6-2 |
| ITF Women Montreux | 2018/09/04 08:00 | Stephanie Wagner v Laura Pigossi | 6-3,6-1 |
| ITF Women Montreux | 2018/09/03 09:00 | Marine Partaud v Stephanie Wagner | 2-6,4-6 |
| ITF Women Montreux | 2018/09/02 11:00 | Stephanie Wagner v Federica Bilardo | 6-2,6-3 |
| ITF Women Braunschweig | 2018/08/19 08:00 | Sofya Lansere v Stephanie Wagner | 6-3,6-2 |
| ITF Women Leipzig | 2018/08/13 12:00 | Stephanie Wagner v Daniela Vismane | 6-1,6-7,4-6 |
| ITF Women Leipzig | 2018/08/12 11:00 | Piter, Katarzyna v Stephanie Wagner | 5-7,6-0,4-6 |
| ITF Women Leipzig | 2018/08/12 09:00 | Chantal Sauvant v Stephanie Wagner | 1-6,0-6 |