Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Johannesburg | 2021/09/21 07:00 | Goldsteiner, Peter v Arends, Robbie | 6-1,6-1 |
| ITF M25 Johannesburg | 2021/09/20 07:00 | Goldsteiner, Peter v Caripi, Vasilios | 6-0,6-1 |
| ITF M25 Johannesburg | 2021/09/19 08:40 | Goldsteiner, Peter v van Wyk, Francois | 6-0,6-2 |
| ITF M25 Johannesburg | 2021/09/15 08:00 | Goldsteiner, Peter v Simon, Sahar | 2-6,2-6 |
| ITF M15 Zilina | 2021/09/03 09:25 | Goldsteiner, Peter v Malla, Bastian | 0-6,1-6 |
| ITF M15 Zilina | 2021/09/02 08:00 | Goldsteiner, Peter v Lukas H Lilleengen | 6-7,6-0,6-2 |
| ITF M15 Zilina | 2021/09/01 12:25 | Gonzalo Villanueva v Goldsteiner, Peter | 4-6,3-6 |
| ITF M15 Parnu | 2021/08/05 07:00 | Goldsteiner, Peter v Roncalli, Simone | 5-7,0-6 |
| ITF M25 Johannesburg | 2021/09/14 07:50 | Seelig, Kyle v Filip Peliwo | 3-6,4-6 |
| ITF - M15 Monastir | 2021/09/05 08:30 | Seelig, Kyle v Renta Tokuda | 5-7,0-6 |
| ITF - M15 Monastir | 2021/09/04 08:30 | Li Tu v Seelig, Kyle | 5-7,2-6 |
| ITF - M15 Monastir | 2021/09/03 08:00 | Seelig, Kyle v Dane Sweeny | 6-4,6-4 |
| ITF - M15 Monastir | 2021/09/02 08:00 | Brymer, Gage v Seelig, Kyle | 4-6,0-6 |
| ITF - M15 Monastir | 2021/09/01 09:30 | Seelig, Kyle v Ezekiel Clark | 6-0,6-4 |
| ITF - M15 Monastir | 2021/08/31 08:00 | Seelig, Kyle v Alan F R Fierros | 6-2,6-4 |
| ITF - M15 Monastir | 2021/08/30 10:00 | Seelig, Kyle v Bryan Aguiar Kuntz | 6-0,6-4 |