Stadium: Court 1 Round: 14 Ground: Hardcourt outdoor
| Challenger Hamburg | 2020/10/24 17:30 | Julian Lenz v Tobias Kamke | 3-6,1-6 |
| German Masters | 2020/07/29 15:05 | Tobias Kamke v Julian Lenz | 6-3,6-2 |
| Challenger Quimper | 2021/01/24 13:00 | Tung-Lin Wu v Julian Lenz | 4-6,6-3,6-1 |
| Australian Open | 2021/01/12 09:35 | Damir Dzumhur v Julian Lenz | 6-2,6-2 |
| Australian Open | 2021/01/11 07:30 | Julian Lenz v Renzo Olivo | 1-6,6-2,6-2 |
| Challenger Maia | 2020/12/01 11:00 | Jozef Kovalik v Julian Lenz | 6-1,4-6,6-2 |
| Challenger Ortisei | 2020/11/20 15:00 | Julian Lenz v Antoine Hoang | 7-6,4-6,3-6 |
| Challenger Ortisei | 2020/11/19 11:40 | Roberto Marcora v Julian Lenz | 3-6,6-7 |
| Challenger Ortisei | 2020/11/17 16:45 | Lukas Klein v Julian Lenz | 3-6,5-7 |
| Challenger Bratislava | 2020/11/09 11:00 | Julian Lenz v Maximilian Marterer | 5-7,4-6 |
| Challenger Quimper | 2021/01/25 09:30 | Tobias Kamke v Kacper Zuk | 1-6,4-6 |
| Challenger Quimper | 2021/01/24 09:30 | Tobias Kamke v Evgeny Karlovskiy | 6-3,6-4 |
| Australian Open | 2021/01/10 07:30 | Henri Laaksonen v Tobias Kamke | 7-5,6-3 |
| Challenger Hamburg | 2020/10/28 16:00 | Henri Laaksonen v Tobias Kamke | 7-6,7-5 |
| Challenger Hamburg | 2020/10/27 13:05 | Prajnesh Gunneswaran v Tobias Kamke | 6-3,4-6,1-6 |
| Challenger Hamburg | 2020/10/25 12:50 | Illya Marchenko v Tobias Kamke | 7-6,3-6,0-6 |
| Challenger Hamburg | 2020/10/24 17:30 | Julian Lenz v Tobias Kamke | 3-6,1-6 |
| Challenger Ismaning | 2020/10/23 10:30 | Botic Van De Zandschulp v Tobias Kamke | 6-3,3-6,7-6 |