Stadium: Center Court Round: 19 Ground: Clay
| Challenger Split | 2021/04/04 09:00 | Blaz Kavcic v Bozo Barun | 6-4,6-3 |
| Challenger Zadar | 2021/03/26 11:40 | Dimitar Kuzmanov v Blaz Kavcic | 6-4,6-1 |
| Challenger Zadar | 2021/03/24 09:00 | Blaz Kavcic v Alex Molcan | 6-2,6-1 |
| Challenger Zadar | 2021/03/22 12:45 | Blaz Kavcic v Andrea Pellegrino | 6-3,6-1 |
| Challenger Gran Canaria | 2021/03/06 14:00 | Blaz Kavcic v Carlos Gimeno Valero | 6-3,1-6,5-7 |
| Challenger Gran Canaria | 2021/03/05 12:15 | Alex Molcan v Blaz Kavcic | 4-6,5-7 |
| Challenger Gran Canaria | 2021/03/03 11:00 | Blaz Kavcic v Riccardo Bonadio | 6-2,6-4 |
| Challenger Gran Canaria | 2021/03/01 14:45 | Blaz Kavcic v Michael Vrbensky | 6-4,6-4 |
| Challenger Split | 2021/04/04 10:35 | Matteo Martineau v Matija Pecotic | 6-4,0-6,6-4 |
| Challenger Lille | 2021/03/23 10:45 | Matteo Martineau v Nicola Kuhn | 3-6,2-6 |
| Challenger Lille | 2021/03/22 10:00 | Matteo Martineau v Tak Khunn Wang | 7-5,7-5 |
| Challenger Lille | 2021/03/21 10:30 | Benjamin Hassan v Matteo Martineau | 1-6,2-6 |
| ITF - Trimbach M25 | 2021/03/13 11:00 | Elmar Ejupovic v Matteo Martineau | 4-6,7-6,6-3 |
| ITF - Trimbach M25 | 2021/03/12 08:55 | Jakub Paul v Matteo Martineau | 6-7,7-6,3-6 |
| ITF - Trimbach M25 | 2021/03/11 09:00 | Jerome Kym v Matteo Martineau | 6-3,3-6,2-6 |
| ITF - Trimbach M25 | 2021/03/10 13:45 | Remy Bertola v Matteo Martineau | 3-6,3-6 |