Stadium: Court Central Round: 26
| ITF Women Saint Gaudens | 2017/05/20 12:30 | Valentini Grammatikopoulou v Richel Hogenkamp | 4-6,3-6 |
| ITF Women Saint Gaudens | 2018/05/16 08:00 | Valentini Grammatikopoulou v Kimberly Birrell | 4-6,7-5,6-2 |
| ITF Women Khimki | 2018/05/02 10:30 | Valentini Grammatikopoulou v Julia Glushko | 4-6,6-7 |
| ITF Women Khimki | 2018/05/01 09:45 | Valentini Grammatikopoulou v Angelina Gabueva | 6-7,7-6,6-4 |
| 2018 Fed Cup | 2018/04/21 08:00 | Valentini Grammatikopoulou v Eleonora Molinaro | 3-6,6-3,4-6 |
| 2018 Fed Cup | 2018/04/20 08:00 | Clara Tauson v Valentini Grammatikopoulou | 7-6,6-7,0-6 |
| 2018 Fed Cup | 2018/04/19 08:00 | Dona Abo Habaga v Valentini Grammatikopoulou | 2-6,3-6 |
| WTA Bogota | 2018/04/12 15:00 | Valentini Grammatikopoulou v Johanna Larsson | 6-4,4-6,4-6 |
| WTA Bogota | 2018/04/11 15:00 | Valentini Grammatikopoulou v Miyu Kato | 5-7,6-4,6-4 |
| ITF Women Saint Gaudens | 2018/05/16 13:10 | Myrtille Georges v Richel Hogenkamp | 3-6,6-4,3-6 |
| WTA Prague | 2018/04/30 12:05 | Ekaterina Alexandrova v Richel Hogenkamp | 7-6,6-1 |
| WTA Istanbul Qual | 2018/04/23 09:30 | Richel Hogenkamp v Viktoriya Tomova | 1-6,2-6 |
| WTA Istanbul Qual | 2018/04/22 11:30 | Richel Hogenkamp v Melis Sezer | 6-4,7-6 |
| WTA Lugano | 2018/04/11 18:10 | Aliaksandra Sasnovich v Richel Hogenkamp | 7-6,6-0 |
| WTA Lugano Qual | 2018/04/09 15:25 | Richel Hogenkamp v Marie Bouzkova | 6-3,5-7,6-4 |
| WTA Lugano Qual | 2018/04/08 14:50 | Richel Hogenkamp v Anne Schaefer | 6-0,6-4 |
| ITF Women Santa Margherita | 2018/04/03 20:10 | Richel Hogenkamp v Elena-Gabriela Ruse | 3-6,2-6 |