| ITF W15 Sozopol | 2019/10/02 11:00 | Ruseva, Nikol v Stefana Lazar | 1-6,3-6 |
| ITF - W15 Antalya | 2021/02/14 06:00 | Kimmelmann, Julia v Ruseva, Nikol | 6-3,6-1 |
| ITF - W15 Antalya | 2021/02/07 09:30 | Ruseva, Nikol v Ogescu, Simona | 4-6,1-6 |
| ITF - W15 Antalya | 2021/01/31 11:30 | Ruseva, Nikol v Iordache, Alexandra | 5-7,2-6 |
| ITF W15 Pazardzhik | 2020/10/27 08:00 | Zund, Sylvie v Ruseva, Nikol | 6-1,6-3 |
| ITF W15 Pazardzhik | 2020/10/26 09:30 | Veleva, Beloslava v Ruseva, Nikol | 6-2,2-6,7-10 |
| ITF W15 Varna | 2020/09/09 06:30 | Rosca, Ioana Loredana v Ruseva, Nikol | 6-3,6-1 |
| ITF Women Varna | 2020/09/08 07:30 | Ruseva, Nikol v Shkumbova, Mirela | 6-3,6-1 |
| ITF Women Varna | 2020/09/07 06:30 | Stamat, Vitalia v Ruseva, Nikol | 4-6,6-2,7-10 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/03 12:00 | Stefana Lazar v Rositsa Dencheva | 4-6,0-6 |
| UTR Pro Tennis Series Bucharest Women | 2021/05/01 06:00 | Stefana Lazar v Gaspar-Ivan, Ioana | 3-6,2-6 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/30 09:00 | Stefana Lazar v Patricia Maria Tig | 3-6,2-5 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/29 07:00 | Stefana Lazar v Georgia Andreea Craciun | 2-6,0-5 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/28 10:00 | Silvia Maria Costache v Stefana Lazar | 4-6,2-6 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/27 10:00 | Elena-Teodora Cadar v Stefana Lazar | 7-5,6-2 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/25 08:30 | Oana Georgeta Simion v Stefana Lazar | 7-6,7-6 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/24 12:00 | Stefana Lazar v Ralitsa Alexandrova | 6-2,5-1 |