Stadium: Court 3 Round: 27 Ground: Hardcourt indoor
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2017/02/10 08:00 | Kolar, Nastja v Ivakhnenko, Valentyna | 2-6,4-6 |
| Almaty, Singles Qualifying W-WITF-KAZ-01A | 2018/08/29 07:05 | Ivakhnenko, Valentyna v Ekaterina Kazionova | 6-1,6-2 |
| Almaty, Singles Qualifying W-WITF-KAZ-01A | 2018/08/28 09:55 | Ivakhnenko, Valentyna v Sofya Lansere | 6-4,6-3 |
| US Open Women | 2018/08/21 15:00 | Ivakhnenko, Valentyna v Marta Kostyuk | 6-4,6-7,6-7 |
| WTA Moscow | 2018/07/27 09:35 | Ivakhnenko, Valentyna v Anastasia Potapova | 6-1,3-6,2-6 |
| WTA Moscow | 2018/07/25 10:15 | Flink, Varvara v Ivakhnenko, Valentyna | 6-7,3-6 |
| WTA Moscow | 2018/07/24 09:55 | Ivakhnenko, Valentyna v Kovinic, Danka | 6-2,7-5 |
| WTA Moscow Qual | 2018/07/23 10:45 | Veronika Kudermetova v Ivakhnenko, Valentyna | 7-6,0-6,5-7 |
| WTA Moscow Qual | 2018/07/23 09:10 | Ianchuk, Olga v Ivakhnenko, Valentyna | 6-1,0-6,2-6 |
| Almaty, Singles Qualifying W-WITF-KAZ-01A | 2018/08/29 04:30 | Talbi, Shalimar v Kolar, Nastja | 1-6,0-6 |
| Almaty, Singles Qualifying W-WITF-KAZ-01A | 2018/08/27 05:00 | Li, Jiakang v Kolar, Nastja | 0-6,1-6 |
| ITF Women Fort Worth | 2018/08/02 16:30 | Kolar, Nastja v Graham, Alexa | 0-6,4-6 |
| ITF Women Fort Worth | 2018/08/01 15:40 | Kolar, Nastja v Broadus, Savannah | 6-3,6-4 |
| ITF Women Granby | 2018/07/24 15:45 | Kolar, Nastja v Erika Sema | 2-6,1-6 |
| ITF Women Honolulu | 2018/07/13 00:30 | Kolar, Nastja v Muhammad, Asia | 4-6,2-6 |
| ITF Women Honolulu | 2018/07/11 20:00 | Schaefer, Dominique v Kolar, Nastja | 6-1,5-7,3-6 |
| ITF Women Bastad | 2018/06/27 08:45 | Kolar, Nastja v Estelle Cascino | 3-6,1-6 |