Stadium: Court 3 Round: 44 Ground: Hardcourt outdoor
| ITF - W15 Sharm El Sheikh | 2021/10/07 10:25 | Silvia Ambrosio v Duca, Gabriela | 6-1,6-1 |
| ITF - W15 Sharm El Sheikh | 2021/10/06 08:00 | Duca, Gabriela v Elena-Teodora Cadar | 6-3,6-3 |
| 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 | Duca, Gabriela v Anil, Cemre | 6-0,6-3 |
| ITF - W15 Sharm El Sheikh | 2021/03/07 13:30 | Tamira Paszek v Duca, Gabriela | 6-2,6-0 |
| ITF - W15 Sharm El Sheikh | 2021/02/28 13:30 | Martha Matoula v Duca, Gabriela | 6-2,6-2 |
| ITF - W15 Sharm El Sheikh | 2021/02/21 11:30 | Gaggini, Valentina v Duca, Gabriela | 6-3,6-1 |
| ITF - W15 Sharm El Sheikh | 2021/02/15 07:30 | Sewing, Sofia v Duca, Gabriela | 6-3,6-3 |
| ITF - W15 Sharm El Sheikh | 2021/10/08 08:00 | Tamara Kostic v Ruppert, Lena | 6-3,4-6,0-6 |
| ITF - W15 Sharm El Sheikh | 2021/10/07 08:00 | Jiaqi Wang v Tamara Kostic | 7-6,2-6,3-6 |
| ITF - W15 Sharm El Sheikh | 2021/10/05 08:00 | Tamara Kostic v Kira Pavlova | 6-2,0-6,6-2 |
| ITF - W15 Sharm El Sheikh | 2021/10/04 08:00 | Tamara Kostic v Amelie-C Janssen | 7-6,6-2 |
| ITF W25 Vienna | 2021/08/31 17:15 | Maria F Herazo Gonzalez v Tamara Kostic | 6-3,4-6,6-1 |
| ITF W15 Bad Waltersdorf | 2021/08/25 12:05 | Tamara Kostic v Katarina Kuzmova | 5-7,4-6 |
| ITF W15 Don Benito | 2021/07/21 07:00 | Tamara Kostic v Olga Parres Azcoitia | 7-5,0-6,4-6 |
| ITF W15 Don Benito | 2021/07/20 11:05 | Tamara Kostic v Claudia Martinez de Velasco | 6-2,6-3 |