Stadium: Court 1 Round: 29 Ground: Clay
| ITF - M25 Kiseljak - HD | 2021/05/29 10:00 | Reis da Silva/Sels v Babic/Fallert | 6-4,3-6,10-3 |
| ITF - M25 Kiseljak - HD | 2021/05/27 12:25 | Reis da Silva/Sels v Kekez/Vidak | 6-2,6-2 |
| ITF - M25 Kiseljak - HD | 2021/05/25 15:35 | Reis da Silva/Sels v Jakic/Stipetic | 6-4,6-0 |
| ITF - M25 Kiseljak - HD | 2021/05/28 17:00 | Basic/Fatic v Klier Junior/P De Almeida | 7-5,3-6,8-10 |
| ITF - M25 Kiseljak - HD | 2021/05/27 13:40 | Onclin/Riedi v Klier Junior/P De Almeida | 2-6,7-6,13-15 |
| ITF - M25 Kiseljak - HD | 2021/05/25 15:35 | Makk/Palovic v Klier Junior/P De Almeida | 0-6,1-6 |