Stadium: Centre Court 14 Round: 62 Ground: Clay
| ITF M15 LPD Gran Canaria | 2021/04/28 11:25 | Musialek, Alexis v Arthur Reymond | 6-2,3-6,6-7 |
| ITF M15 Cairo | 2021/04/14 15:10 | Carlos Lopez Montagud v Musialek, Alexis | 5-7,7-6,6-3 |
| ITF - M15 Monastir | 2021/04/07 08:30 | Musialek, Alexis v Alberto Barroso Campos | 2-6,7-6,2-6 |
| ITF - M15 Poitiers | 2021/03/17 11:25 | Edan Leshem v Musialek, Alexis | 6-3,6-3 |
| ITF - M25 Vale Do Lobo | 2021/03/11 13:10 | Kaichi Uchida v Musialek, Alexis | 6-0,6-1 |
| ITF - M25 Vale Do Lobo | 2021/03/10 10:00 | Musialek, Alexis v Axel Garcian | 6-2,6-2 |
| ITF - M25 Faro | 2021/03/03 11:00 | Wang, Tak Khunn v Musialek, Alexis | 6-1,6-0 |
| ITF - M25 Faro | 2021/03/02 11:30 | Musialek, Alexis v Cabral, Francisco | 6-4,6-2 |
| ITF M15 Las Palmas | 2021/04/25 14:30 | Rafael Giotis v Breysach , Martin | 5-7,6-2,10-4 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/20 12:15 | Breysach , Martin v David Pichler | 2-6,1-6 |
| Challenger - Lille | 2021/03/21 15:15 | Breysach , Martin v Filip Cristian Jianu | 3-6,3-6 |
| ITF - M15 Poitiers | 2021/03/19 11:00 | Breysach , Martin v Lucas Poullain | 0-6,3-6 |
| ITF - M15 Poitiers | 2021/03/18 09:30 | Breysach , Martin v Max Wiskandt | 6-2,6-7,6-4 |
| ITF - M15 Poitiers | 2021/03/17 09:00 | Veldheer, Mick v Breysach , Martin | 1-6,6-4,6-7 |
| ITF M15 Bratislava | 2021/03/10 15:15 | Kalenichenko, Danylo v Breysach , Martin | 7-5,4-6,7-5 |
| ITF - M25 Vale Do Lobo | 2021/02/21 11:30 | Lukas H Lilleengen v Breysach , Martin | 3-6,6-2,11-9 |