| ITF W15 Heraklion | 2021/05/24 08:00 | Silvia Martinez Jimenez v Stefana Lazar | 6-2,6-1 |
| ITF W15 Heraklion | 2021/05/17 08:00 | Fabienne Gettwart v Stefana Lazar | 6-3,6-1 |
| UTR Pro Pazardzhik Women | 2021/05/08 11:00 | Stefana Lazar v Iva Ivanova | 4-6,6-4,3-6 |
| UTR Pro Pazardzhik Women | 2021/05/07 11:30 | Simona Ogescu v Stefana Lazar | 6-1,6-0 |
| UTR Pro Pazardzhik Women | 2021/05/06 07:00 | Darja Semenistaja v Stefana Lazar | 6-4,6-3 |
| UTR Pro Pazardzhik Women | 2021/05/04 08:30 | Nikol Ruseva v Stefana Lazar | 2-6,2-5 |
| UTR Pro 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 Ioana Gaspar | 3-6,2-6 |