Stadium: Court 3 Round: 62
| ITF Women Maribor | 2018/06/13 08:00 | Nina Alibalic v Katarina Kostic | 7-5,6-3 |
| ITF Women Maribor Qual | 2018/06/11 08:40 | Katarina Kostic v Emily Morton | 6-2,6-2 |
| ITF Women Maribor Qual | 2018/06/10 11:35 | Taro Keens v Katarina Kostic | 2-6,1-6 |
| ITF Women Maribor Qual | 2018/06/09 07:30 | Ayline Esina Samardzic v Katarina Kostic | 5-7,2-6 |
| ITF Women Banja Luka Qual | 2018/06/02 14:00 | Katarina Kostic v Romana Cisovska | 5-7,3-6 |
| ITF Women Nis Qual | 2018/05/28 07:30 | Tijana Spasojevic v Katarina Kostic | 6-2,6-2 |
| ITF Women Nis Qual | 2018/05/26 12:30 | Katarina Kostic v Ksenija Tmusic | 6-1,6-2 |
| ITF Women Podgorica Qual | 2017/09/16 08:00 | Mila Mejic v Katarina Kostic | 6-1,6-4 |
| ITF Women Hammamet | 2018/06/12 09:00 | Andrijana Stoilkovic v Paula Baranano | 1-6,6-4,0-6 |
| ITF Women Banja Luka Qual | 2018/06/03 07:00 | Andrijana Stoilkovic v Stella Kovacicova | 2-6,2-6 |
| ITF Women Banja Luka Qual | 2018/06/02 09:00 | Andrijana Stoilkovic v Mila Mejic | 6-0,4-6,7-6 |
| ITF Women Nis | 2018/05/30 08:00 | Despina Papamichail v Andrijana Stoilkovic | 6-0,7-5 |
| ITF Women Nis Qual | 2018/05/28 10:15 | Andrijana Stoilkovic v Paula M Onita | 6-3,6-1 |
| ITF Women Nis Qual | 2018/05/26 12:30 | Andrijana Stoilkovic v Viktoria Surova | 6-4,6-4 |
| ITF Women Antalya | 2018/05/02 09:25 | Andrijana Stoilkovic v Lara Escauriza | 6-7,6-3,2-6 |
| ITF Women Antalya | 2018/04/30 06:30 | Jennifer Luikham v Andrijana Stoilkovic | 6-2,3-6,4-6 |