Stadium: Court 1 Round: 46
| WTA Stuttgart Qual | 2018/04/21 15:50 | Carina Witthoeft v Michaela Honcova | 6-0,6-1 |
| WTA Lugano | 2018/04/11 11:30 | Kirsten Flipkens v Carina Witthoeft | 1-6,6-4,6-3 |
| WTA Miami | 2018/03/24 15:00 | Carina Witthoeft v Zarina Diyas | 6-4,5-7,0-6 |
| WTA Miami | 2018/03/22 19:05 | Julia Goerges v Carina Witthoeft | 6-7,6-4,4-6 |
| WTA Miami | 2018/03/21 15:00 | Tatjana Maria v Carina Witthoeft | 3-6,4-6 |
| WTA Budapest | 2018/02/21 09:00 | Jana Cepelova v Carina Witthoeft | 6-2,6-2 |
| WTA Doha | 2018/02/14 14:50 | Caroline Wozniacki v Carina Witthoeft | 6-2,6-0 |
| WTA Doha | 2018/02/13 14:15 | Tatjana Maria v Carina Witthoeft | 3-6,0-6 |
| WTA Stuttgart Qual | 2018/04/21 17:50 | Anna Zaja v Katharina Hobgarski | 6-4,6-4 |
| ITF Women Santa Margherita | 2018/04/12 16:45 | Tamara Zidansek v Anna Zaja | 6-4,7-5 |
| ITF Women Santa Margherita | 2018/04/10 15:00 | Marie Benoit v Anna Zaja | 3-6,4-6 |
| ITF Women Santa Margherita | 2018/04/03 18:25 | Anna Zaja v Anastasia Zarycka | 2-6,1-6 |
| ITF Women Croissy-Beaubourg | 2018/03/26 12:50 | Anna Zaja v Paula Badosa | 6-4,3-6,4-6 |
| ITF Women Shenzhen Qual | 2018/03/11 04:30 | Kimberley Zimmermann v Anna Zaja | 6-1,6-4 |
| ITF Women Shenzhen Qual | 2018/03/10 05:20 | Xiaodi You v Anna Zaja | 6-3,5-7,4-6 |
| ITF Women Zhuhai Qual | 2018/03/05 03:40 | Anna Zaja v Xinyu Wang | 6-4,3-6,1-6 |