Stadium: Court 2 Round: 29 Ground: Hardcourt outdoor
| ITF W15 Sozopol | 2021/09/18 07:00 | Kolar, Nastja v Dia Evtimova | 7-6,7-5 |
| ITF W15 Sozopol | 2021/09/17 08:35 | Kolar, Nastja v Defne Cirpanli | 6-1,6-3 |
| ITF W15 Sozopol | 2021/09/16 12:20 | Kolar, Nastja v Duca, Gabriela | 6-4,4-6,6-3 |
| ITF W15 Sozopol | 2021/09/14 09:00 | Kolar, Nastja v Yoana Moneva | 6-0,6-0 |
| UTR Pro Tennis Series Sofia Women | 2021/09/02 10:00 | Martha Matoula v Kolar, Nastja | 6-4,1-1 |
| UTR Pro Tennis Series Sofia Women | 2021/09/01 08:00 | Maja Radenkovic v Kolar, Nastja | 6-2,0-6,0-6 |
| UTR Pro Tennis Series Sofia Women | 2021/08/31 09:30 | Shkumbova, Mirela v Kolar, Nastja | 2-6,6-2,1-5 |
| ITF W25 Braunschweig | 2021/08/26 09:00 | Kolar, Nastja v Katharina Hobgarski | 2-6,4-6 |
| ITF W15 Sozopol | 2021/09/18 08:00 | Oana Gavrila v Catini, Chiara | 3-6,1-6 |
| ITF W15 Sozopol | 2021/09/16 08:55 | Katarina Kuzmova v Catini, Chiara | 3-6,6-4,2-6 |
| ITF W15 Sozopol | 2021/09/15 12:30 | Stefana Lazar v Catini, Chiara | 2-6,4-6 |
| ITF W15 Varna | 2021/09/09 06:30 | Elena-Teodora Cadar v Catini, Chiara | 3-6,7-6,6-1 |
| ITF W15 Varna | 2021/09/08 08:00 | Catini, Chiara v Kaul, Maria Lota | 6-4,6-1 |
| ITF W60 Prague | 2021/08/29 11:00 | Alice Rame v Catini, Chiara | 6-0,6-1 |
| ITF W15 Chornomorsk | 2021/08/27 11:40 | Catini, Chiara v Nicole Fossa Huergo | 1-6,1-6 |
| ITF W15 Chornomorsk | 2021/08/26 07:00 | Catini, Chiara v Bokova, Vladlena | 6-3,6-1 |