Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Johannesburg | 2021/09/21 10:30 | Ribeiro Marcondes, Igor v Sibanda, Mehluli Don Ayanda | 6-1,7-5 |
| ITF M25 Johannesburg | 2021/09/14 08:00 | Ribeiro Marcondes, Igor v Kelsey Stevenson | 5-7,6-7 |
| ITF M25 Sintra | 2021/09/08 14:35 | Dan Added v Ribeiro Marcondes, Igor | 6-2,6-4 |
| ITF M25 Poznan | 2021/08/27 11:30 | Pawel Juszczak v Ribeiro Marcondes, Igor | 6-2,5-7,6-4 |
| ITF M25 Poznan | 2021/08/26 09:00 | Ribeiro Marcondes, Igor v Podzus, Martins | 6-4,6-1 |
| ITF M15 Lodz | 2021/08/20 08:00 | Ribeiro Marcondes, Igor v Wilson Leite | 2-6,1-6 |
| ITF M15 Lodz | 2021/08/19 08:00 | Ribeiro Marcondes, Igor v Valerio Aboian | 6-3,6-1 |
| ITF M15 Lodz | 2021/08/17 10:45 | Ribeiro Marcondes, Igor v Orlikowski, Aleksander | 7-6,6-4 |
| ITF M25 Johannesburg | 2021/09/22 10:05 | Goldsteiner, Peter v Seelig, Kyle | 0-6,6-2,2-6 |
| 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 |