Stadium: Court 5 Round: 25 Ground: Clay
| Challenger Lille | 2021/03/21 15:15 | Martin Breysach v Filip Cristian Jianu | 3-6,3-6 |
| ITF M15 Poitiers | 2021/03/19 11:00 | Martin Breysach v Lucas Poullain | 0-6,3-6 |
| ITF M15 Poitiers | 2021/03/18 09:30 | Martin Breysach v Max Wiskandt | 6-2,6-7,6-4 |
| ITF M15 Poitiers | 2021/03/17 09:00 | Mick Veldheer v Martin Breysach | 1-6,6-4,6-7 |
| ITF M15 Bratislava | 2021/03/10 15:15 | Danylo Kalenichenko v Martin Breysach | 7-5,4-6,7-5 |
| ITF M25 Vale Do Lobo | 2021/02/21 11:30 | Lukas H Lilleengen v Martin Breysach | 3-6,6-2,11-9 |
| ITF M15 Grenoble | 2021/02/10 12:15 | Martin Breysach v Lucas Poullain | 2-6,2-6 |
| ITF M15 Monastir | 2021/01/13 08:00 | Simon Yitbarek v Martin Breysach | 7-5,3-6,1-6 |
| ITF M25 Meerbusch | 2021/04/17 11:00 | Arthur Cazaux v David Pichler | 6-4,6-4 |
| ITF M25 Meerbusch | 2021/04/16 13:00 | David Pichler v Tim Handel | 6-4,6-4 |
| ITF M25 Meerbusch | 2021/04/13 09:30 | David Pichler v John Sperle | 6-0,6-2 |
| ITF M25 Meerbusch | 2021/04/12 09:30 | David Pichler v Jing L Weng | 6-2,6-1 |
| ITF M25 Meerbusch | 2021/04/11 14:30 | David Pichler v Nikolas Walterscheid-Tukic | 6-1,6-1 |
| Challenger Marbella | 2021/03/28 13:40 | Holger Rune v David Pichler | 6-1,6-3 |
| ITF M15 Opatija | 2021/03/24 10:45 | Giacomo Dambrosi v David Pichler | 3-6,6-1,6-2 |
| ITF M15 Rovinj | 2021/03/19 12:05 | David Pichler v Martin Damm | 1-6,2-6 |