Stadium: Court 5 Round: 26 Ground: Clay
| ITF M25 Klosters | 2021/06/22 09:20 | Tanner, Gian Luca v Hampel, Lenny | 5-7,4-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 08:00 | Hampel, Lenny v Titouan Droguet | 6-2,5-7,2-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/18 11:00 | Hampel, Lenny v Martin Krumich | 6-3,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/17 08:30 | Hampel, Lenny v Recek, Dominik | 6-2,7-5 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 11:30 | Hampel, Lenny v Kris Krawcewicz | 7-5,6-2 |
| ITF M25 Prague | 2021/05/11 10:40 | Franco Agamenone v Hampel, Lenny | 6-3,6-3 |
| ITF M25 Prague | 2021/05/10 09:00 | Dominique Graf v Hampel, Lenny | 3-6,4-6 |
| ITF M25 Prague | 2021/05/09 12:30 | Matthew William Donald v Hampel, Lenny | 2-6,6-4,8-10 |
| ITF M25 Klosters | 2021/06/22 09:10 | Daniel Cukierman v Matheus P De Almeida | 1-6,6-7 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/06 08:00 | Matheus P De Almeida v Hernan Casanova | 2-6,0-6 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/05 10:35 | Matheus P De Almeida v Gergely Madarasz | 7-5,6-0 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/04 09:00 | Skander Mansouri v Matheus P De Almeida | 3-6,6-3,2-6 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/03 09:00 | Soares Klier, Gilbert v Matheus P De Almeida | 6-4,3-6,3-6 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/06/02 10:50 | Barun, Bozo v Matheus P De Almeida | 3-6,2-6 |
| ITF M25 Kiseljak | 2021/05/30 12:30 | Matheus P De Almeida v Forti, Francesco | 6-4,2-6,6-4 |
| ITF M25 Kiseljak | 2021/05/29 10:00 | Matheus P De Almeida v Aldin Setkic | 6-4,6-2 |