Stadium: Court 3 Round: 25 Ground: Clay
| 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 |
| ITF M15 Rovinj | 2021/03/16 12:55 | Frane Nincevic v Gian Marco Ortenzi | 6-1,6-4 |
| ITF M15 Bucharest | 2021/05/27 08:00 | Mathieu Perchicot v Cezar Cretu | 6-4,3-6,3-6 |
| ITF M15 Bucharest | 2021/05/25 16:00 | Mathieu Perchicot v Dan Alexandru Tomescu | 6-3,7-6 |
| ITF M15 Troisdorf | 2021/05/11 12:15 | Luca Van Assche v Mathieu Perchicot | 6-4,6-2 |
| Challenger Salinas 2 | 2021/04/26 18:25 | Facundo Diaz Acosta v Mathieu Perchicot | 6-1,6-4 |
| Challenger Salinas | 2021/04/19 16:55 | Marek Gengel v Mathieu Perchicot | 6-3,3-6,7-5 |
| Challenger Salinas | 2021/04/18 18:00 | Mathieu Perchicot v Benjamin Lock | 6-4,0-6,6-4 |
| ITF M25 Reus | 2021/04/15 12:20 | Emilio Nava v Mathieu Perchicot | 6-7,6-4,6-3 |
| ITF M25 Reus | 2021/04/14 11:25 | Max Alcala Gurri v Mathieu Perchicot | 2-6,3-6 |