| UTR Pro Tennis Series Pazardzhik Women | 2021/05/11 11:30 | Kolar, Nastja v Gebriela Mihaylova | 6-3,5-2 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/10 08:30 | Kolar, Nastja v Doroteja Petrovic | 6-0,5-1 |
| ITF W15 Cairo | 2021/04/28 08:00 | Nicole Fossa Huergo v Kolar, Nastja | 6-1,6-1 |
| ITF W15 Cairo | 2021/04/23 09:00 | Maria Timofeeva v Kolar, Nastja | 6-2,7-5 |
| ITF W15 Cairo | 2021/04/22 10:50 | Lian Tran v Kolar, Nastja | 6-7,2-6 |
| ITF W15 Cairo | 2021/04/21 08:00 | Briana Szabo v Kolar, Nastja | 3-6,2-6 |
| ITF W15 Cairo | 2021/04/16 08:30 | Anastasia Zolotareva v Kolar, Nastja | 6-0,6-3 |
| ITF W15 Cairo | 2021/04/15 10:55 | Amiraghyan, Ani v Kolar, Nastja | 6-7,2-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/11 11:30 | D Petrovic v Silvia Maria Costache | 4-6,1-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/09 07:00 | Silvia Maria Costache v Ruseva, Nikol | 6-2,4-6,6-2 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/08 06:00 | Silvia Maria Costache v Doroteja Petrovic | 6-2,7-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/06 11:30 | Silvia Maria Costache v Iva Ivanova | 6-7,3-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/05 10:30 | Silvia Maria Costache v Gaspar-Ivan, Ioana | 4-6,1-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/04 07:00 | Silvia Maria Costache v Luisa Meyer Auf Der Heide | 4-6,1-5 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/03 11:30 | Silvia Maria Costache v Shalamanova, Daria | 0-6,1-5 |
| UTR Pro Tennis Series Bucharest Women | 2021/05/01 09:00 | Silvia Maria Costache v Martinich, Ivania | 0-6,0-6 |