Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Challenger Potchefstroom | 2020/03/11 08:00 | Benjamin Lock v Prechtel, Sebastian | 7-6,6-1 |
| 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 | Pervolarakis, Michail v Benjamin Lock | 6-4,7-6 |
| ITF M25 Johannesburg | 2021/09/24 09:45 | Seelig, Kyle v Benjamin Lock | 6-7,5-7 |
| ITF M25 Johannesburg | 2021/09/23 08:00 | Kelsey Stevenson v Benjamin Lock | 1-6,4-6 |
| ITF M25 Johannesburg | 2021/09/22 08:40 | Simon, Sahar v Benjamin Lock | 4-6,3-6 |
| ITF M25 Johannesburg | 2021/09/17 07:50 | Beale, Jeremy v Benjamin Lock | 6-2,6-4 |
| ITF M25 Johannesburg | 2021/09/15 09:30 | Leonid Sheyngezikht v Benjamin Lock | 2-6,6-4,6-7 |
| ITF M25 Bagneres-De-Bigorre | 2021/09/03 12:20 | Kenny de Schepper v Benjamin Lock | 6-3,7-5 |
| ITF M25 Pretoria | 2021/09/29 11:50 | Claassen, Jody Alan v Prechtel, Sebastian | 3-6,1-6 |
| ITF M25 Johannesburg | 2021/09/23 07:00 | Prechtel, Sebastian v Alastair Gray | 3-6,0-6 |
| ITF M25 Johannesburg | 2021/09/21 10:40 | Filip Peliwo v Prechtel, Sebastian | 3-6,4-6 |
| ITF M25 Johannesburg | 2021/09/14 09:30 | Prechtel, Sebastian v Hunter, Vaughn | 5-7,4-6 |
| ITF M15 Bad Waltersdorf | 2021/09/02 11:10 | Fausto Tabacco v Prechtel, Sebastian | 6-4,6-3 |
| ITF M15 Bad Waltersdorf | 2021/08/25 10:55 | Lipovsek Puches, Tomas v Prechtel, Sebastian | 7-5,6-1 |
| ITF M15 Warmbad-Villach | 2021/08/20 10:55 | Prechtel, Sebastian v Donati, Matteo | 3-6,6-4,3-6 |
| ITF M15 Warmbad-Villach | 2021/08/19 07:55 | Luigi Sorrentino v Prechtel, Sebastian | 4-6,6-3,1-6 |