Stadium: Court 5 Round: 27 Ground: Hardcourt indoor
| Challenger Poznan | 2021/07/26 11:35 | David Poljak v Lucas Gerch | 7-5,1-6,6-4 |
| Challenger Forli | 2021/12/06 13:00 | David Poljak v Lucas Miedler | 7-5,4-6,3-6 |
| ITF M15 Ostrava | 2021/11/26 09:30 | David Poljak v Andrew Paulson | 6-4,6-7,3-6 |
| ITF M15 Ostrava | 2021/11/25 09:00 | David Poljak v Oscar Moraing | 6-2,6-0 |
| ITF M15 Ostrava | 2021/11/24 09:00 | David Poljak v Ondrej Horak | 6-3,3-6,6-3 |
| ITF M15 Opava | 2021/11/21 09:00 | David Poljak v Marvin Moeller | 6-3,7-6 |
| ITF M15 Opava | 2021/11/20 09:00 | David Poljak v Sean Cuenin | 6-4,6-2 |
| ITF M15 Opava | 2021/11/19 09:00 | David Poljak v Andrew Paulson | 6-2,4-6,7-6 |
| ITF M15 Opava | 2021/11/18 11:20 | David Poljak v Ondrej Horak | 6-3,6-3 |
| Challenger Antalya | 2021/11/29 08:55 | Tiago Cacao v Lucas Gerch | 6-1,3-6,6-2 |
| ITF M15 Antalya | 2021/11/28 10:50 | Lucas Gerch v Daniel Michalski | 5-7,0-6 |
| ITF M15 Antalya | 2021/11/26 07:30 | Luis Faria v Lucas Gerch | 0-6,3-6 |
| ITF M15 Antalya | 2021/11/25 07:50 | Hamad Medjedovic v Lucas Gerch | 1-6,1-6 |
| ITF M15 Antalya | 2021/11/24 09:20 | Oleg Prihodko v Lucas Gerch | 1-6,6-4,2-6 |
| Challenger Tenerife | 2021/10/31 11:55 | Filip Cristian Jianu v Lucas Gerch | 6-3,6-1 |
| ITF M25 Portimao | 2021/10/27 14:00 | Matteo Arnaldi v Lucas Gerch | 7-6,6-3 |
| ITF M25 Quinta Do Lago | 2021/10/20 11:10 | Stuart Parker v Lucas Gerch | 7-6,6-1 |