Stadium: Court 4 Round: 26 Ground: Clay
| ITF M15 Sibenik | 2021/05/21 08:00 | Hernan Casanova v Peter Fajta | 6-2,6-2 |
| ITF M15 Sibenik | 2021/05/20 08:00 | Peter Fajta v David Pichler | 7-6,3-6,6-1 |
| ITF M15 Sibenik | 2021/05/19 13:30 | Luka Mikrut v Peter Fajta | 1-6,0-6 |
| ITF M15 Prijedor | 2021/05/14 08:50 | Denis Yevseyev v Peter Fajta | 1-6,6-1,6-2 |
| ITF M15 Prijedor | 2021/05/13 10:05 | Peter Fajta v Marko Miladinovic | 5-7,6-3,7-6 |
| ITF M15 Antalya | 2021/04/21 10:00 | Peter Fajta v Federico Arnaboldi | 3-6,4-6 |
| ITF M15 Antalya | 2021/04/13 07:00 | Sandro Kopp v Peter Fajta | 6-2,7-6 |
| ITF M15 Antalya | 2021/04/06 13:10 | Davide Galoppini v Peter Fajta | 7-5,7-5 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Frane Nincevic v Mathieu Perchicot | 6-2,2-6,4-6 |
| ITF M15 Sibenik | 2021/05/17 08:00 | Nikola Basic v Frane Nincevic | 6-7,6-1,10-8 |
| Challenger Zagreb | 2021/05/09 08:30 | Frane Nincevic v Ramkumar Ramanathan | 4-6,3-6 |
| ITF M15 Sibenik | 2021/04/21 08:00 | Sebastian Prechtel v Frane Nincevic | 6-0,6-3 |
| Challenger Split Qual | 2021/04/11 12:25 | Frane Nincevic v Tristan Lamasine | 1-6,5-7 |
| Challenger Zadar | 2021/03/24 09:00 | Frane Nincevic v Sumit Nagal | 0-6,1-6 |
| Challenger Zadar | 2021/03/22 13:15 | Frane Nincevic v Mili Poljicak | 4-6,6-4,6-3 |
| ITF M15 Rovinj | 2021/03/17 09:00 | Timo Legout v Frane Nincevic | 6-0,7-6 |