Stadium: Centre Court Round: 45 Ground: Hardcourt indoor
| ITF Women Valencia | 2018/09/25 16:55 | Witthoeft, Carina v Jasmine Paolini | 3-6,4-6 |
| Biarritz, Simples W-WITF-FRA-17A | 2018/09/13 15:00 | Witthoeft, Carina v Rebecca Sramkova | 6-7,6-7 |
| Biarritz, Simples W-WITF-FRA-17A | 2018/09/12 13:25 | Witthoeft, Carina v Kostova, Elitsa | 6-4,7-6 |
| US Open Women | 2018/08/29 23:05 | Williams, Serena v Witthoeft, Carina | 6-2,6-2 |
| US Open Women | 2018/08/27 23:40 | Caroline Dolehide v Witthoeft, Carina | 3-6,6-7 |
| New Haven, USA | 2018/08/18 19:15 | Parmentier, Pauline v Witthoeft, Carina | 7-5,6-2 |
| WTA Gstaad | 2018/07/17 08:30 | Rodina, Evgeniya v Witthoeft, Carina | 6-7,6-4,7-6 |
| ITF Women Versmold | 2018/07/13 15:35 | Witthoeft, Carina v Laura Siegemund | 1-6,3-6 |
| ITF Women Valencia | 2018/09/26 09:00 | Andrea Gamiz v Valentini Grammatikopoulou | 3-6,6-4,6-2 |
| ITF Women Zagreb | 2018/09/06 10:55 | Kaja Juvan v Valentini Grammatikopoulou | 6-3,6-2 |
| ITF Women Zagreb | 2018/09/05 10:55 | Lea Boskovic v Valentini Grammatikopoulou | 3-6,6-7 |
| ITF Women Bagnatica | 2018/08/31 12:30 | Valentini Grammatikopoulou v Jasmine Paolini | 2-6,3-6 |
| ITF Women Bagnatica | 2018/08/29 12:00 | Valentini Grammatikopoulou v Marie Benoit | 7-6,6-4 |
| ITF Women Bagnatica | 2018/08/28 14:20 | Valentini Grammatikopoulou v Scala, Camilla | 4-6,6-1,6-1 |
| US Open Women | 2018/08/21 15:00 | Valentini Grammatikopoulou v Soler-Espinosa, Silvia | 4-6,6-7 |
| Chiswick, Simples W-WITF-GBR-13A | 2018/08/11 10:00 | Diatchenko, Vitalia v Valentini Grammatikopoulou | 6-1,7-5 |