Results
| ITF M25 Austin | 11/18 18:00 | - | Jonah Braswell v Oskar Grzegorzewski | 6-3,3-6,6-1 | |
| ITF M25 Columbus | 11/12 18:00 | - |
Oskar Grzegorzewski v
Henry Searle
|
2-6,2-5 | |
| ITF M25 Harlingen | 10/30 15:00 | - | Oskar Grzegorzewski v Zsombor Velcz | 3-6,0-6 | |
| ITF M25 Harlingen | 10/29 17:38 | - | Ioan Alexandru Chirita v Oskar Grzegorzewski | 3-6,4-6 | |
| ITF M25 Harlingen | 10/28 16:30 | - | Oskar Grzegorzewski v Abraham Asaba | 6-3,3-6,0-0 | |
| ITF M15 Ann Arbor | 09/24 17:02 | - | Oskar Grzegorzewski v Shunsuke Mitsui | 1-6,7-6,3-6 | |
| ITF M15 Krakow | 08/21 11:21 | - | Oskar Grzegorzewski v Vladyslav Orlov | 1-6,0-1 | |
| ITF M15 Krakow | 08/19 12:06 | - | Oskar Grzegorzewski v Carles Hernandez | 6-2,2-6,7-5 | |
| ITF M15 Bielsko Biala | 08/12 11:24 | - | Alessio Vasquez v Oskar Grzegorzewski | 6-3,6-3 | |
| ITF M25 Koszalin | 07/30 13:02 | - | Oskar Grzegorzewski v Viacheslav Bielinskyi | 1-6,6-7 | |
| ITF M25 Koszalin | 07/29 09:30 | - | Oskar Grzegorzewski v Juliusz Bienkiewicz | 6-2,7-5 | |
| ITF M15 Lodz | 07/10 13:56 | - | Matyas Cerny v Oskar Grzegorzewski | 4-6,6-1,6-2 |
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