Stadium: Court 5 Round: 62 Ground: Clay
| ITF M15 Sibenik | 2021/04/19 09:15 | Domagoj Biljesko v Luka Mikrut | 6-4,7-5 |
| ITF M15 Sibenik | 2021/04/18 10:00 | Domagoj Biljesko v Peter Samosi | 6-2,6-2 |
| ITF M15 Opatija | 2021/03/23 09:00 | Matic Spec v Domagoj Biljesko | 7-5,6-2 |
| ITF M15 Opatija | 2021/03/22 11:45 | Tadija Radovanovic v Domagoj Biljesko | 6-7,1-6 |
| ITF M15 Rovinj | 2021/03/15 08:30 | Domagoj Biljesko v Victor Vlad Cornea | 3-6,7-5,5-10 |
| ITF M15 Porec | 2021/03/08 14:00 | Mauro De Maio v Domagoj Biljesko | 6-3,7-6 |
| ITF M15 Porec | 2021/03/07 14:30 | Luka Petrovic v Domagoj Biljesko | 5-7,6-3,8-10 |
| ITF M15 Heraklion | 2020/11/23 10:00 | Billy Harris v Domagoj Biljesko | 6-4,7-6 |
| ITF M15 Sibenik | 2021/04/19 08:00 | Christian Sigsgaard v Neil Oberleitner | 7-6,6-4 |
| ITF M15 Sibenik | 2021/04/18 08:00 | Aleksandar Tomas v Christian Sigsgaard | 2-6,7-6,2-10 |
| ITF M15 Sharm El Sheikh | 2021/03/28 14:30 | Ivan Mikhaylyuk v Christian Sigsgaard | 4-6,6-4,10-2 |
| ITF M15 Sharm El Sheikh | 2021/03/22 07:30 | Marco Miceli v Christian Sigsgaard | 7-6,3-6,10-5 |
| ITF M15 Sharm El Sheikh | 2021/03/21 09:30 | Tomas Papik v Christian Sigsgaard | 4-6,2-6 |
| ITF M15 Manacor | 2021/01/12 11:00 | Peter Benjamin Privara v Christian Sigsgaard | 3-6,6-1,10-8 |
| ITF M15 Manacor | 2021/01/11 13:30 | Christian Sigsgaard v Hugo Pontico | 6-2,3-6,10-0 |
| Davis Cup | 2019/09/14 14:30 | Christian Sigsgaard v Altug Celikbilek | 1-6,6-7 |