Stadium: Central Court Round: 14 Ground: Hardcourt indoor
| Challenger Potchefstroom | 2021/02/15 08:00 | Lucas Miedler v Benjamin Lock | 6-7,7-5,6-2 |
| Challenger Eckental | 2021/11/02 15:30 | Max Hans Rehberg v Lucas Miedler | 3-6,4-6 |
| Challenger Eckental | 2021/10/31 13:30 | Lucas Miedler v Johannes Haerteis | 3-6,7-5,3-6 |
| ATP Vienna | 2021/10/24 11:00 | Frances Tiafoe v Lucas Miedler | 6-7,6-4,6-3 |
| ATP Vienna | 2021/10/23 11:10 | Lucas Miedler v Peter Gojowczyk | 7-6,6-2 |
| Challenger Alicante | 2021/10/15 09:00 | Lucas Miedler v Constant Lestienne | 6-7,4-6 |
| Challenger Alicante | 2021/10/13 09:30 | Kacper Zuk v Lucas Miedler | 5-7,3-6 |
| Challenger Alicante | 2021/10/12 08:00 | Santiago Rodriguez Taverna v Lucas Miedler | 5-7,3-6 |
| Challenger Sibiu | 2021/09/28 07:00 | Lucas Miedler v Sumit Nagal | 3-6,1-6 |
| ITF M25 Nur-Sultan | 2021/10/27 09:20 | Beibit Zhukayev v Benjamin Lock | 6-2,6-4 |
| ITF M25 Nur-Sultan | 2021/10/20 05:05 | Sanjar Fayziev v Benjamin Lock | 6-3,6-2 |
| ITF M15 Kazan | 2021/10/15 09:10 | Benjamin Lock v Alibek Kachmazov | 2-6,1-6 |
| ITF M15 Kazan | 2021/10/14 08:25 | Benjamin Lock v Aleksandr Braynin | 4-6,6-3,6-4 |
| ITF M15 Kazan | 2021/10/13 15:40 | Benjamin Lock v Daniel Litvinov | 6-1,6-3 |
| ITF M25 Pretoria | 2021/09/30 07:30 | Benjamin Lock v Sebastian Prechtel | 6-2,3-6,5-7 |
| ITF M25 Pretoria | 2021/09/29 12:00 | Benjamin Lock v Alec Beckley | 6-4,7-6 |
| ITF M25 Johannesburg | 2021/09/25 08:00 | Michail Pervolarakis v Benjamin Lock | 6-4,7-6 |