Stadium: Court 8 Round: 54 Ground: Clay
| ITF M25 Bolton | 2019/04/03 13:20 | Zizou Bergs v Piotr Grynkowski | 6-4,6-2 |
| ITF M25 Bolton | 2019/04/01 15:40 | Scott Duncan v Piotr Grynkowski | 2-6,6-3,7-10 |
| ITF M25 Bolton | 2019/04/01 09:30 | Arturs Lazdins v Piotr Grynkowski | 4-6,4-6 |
| ITF - M15 Sharm El Sheikh | 2019/03/04 08:00 | Piotr Grynkowski v Jean Thirouin | 6-3,0-6,5-10 |
| ITF - M15 Sharm El Sheikh | 2019/02/28 11:25 | Piotr Grynkowski v Adam Moundir | 3-6,6-3,5-7 |
| ITF - M15 Sharm El Sheikh | 2019/02/26 08:00 | Agustin Velotti v Piotr Grynkowski | 4-6,2-6 |
| ITF - M15 Sharm El Sheikh | 2019/02/25 08:00 | Yvo Panak v Piotr Grynkowski | 7-6,4-6,5-10 |
| ITF Czech Republic F11 Qual | 2018/11/19 14:00 | Piotr Grynkowski v Jakob Aichhorn | 2-6,5-7 |
| ITF - M15 Antalya | 2019/05/06 07:00 | Burak Bilgin v Giordan Kunz | 2-6,6-7 |
| ITF - M15 Antalya | 2019/04/30 07:15 | Max Houkes v Giordan Kunz | 6-0,6-2 |
| ITF - M15 Antalya | 2019/04/29 06:45 | Egor Matvievici v Giordan Kunz | 7-5,2-6,6-10 |
| ITF - M15 Sharm El Sheikh | 2019/02/18 07:30 | Giordan Kunz v George Botezan | 3-6,3-6 |
| ITF - M15 Sharm El Sheikh | 2019/02/11 09:00 | Sebastian Prechtel v Giordan Kunz | 6-3,6-3 |
| ITF M25 Oberentfelden | 2019/02/04 08:30 | Mirko Martinez v Giordan Kunz | 6-4,6-1 |
| ITF Egypt F29 | 2018/11/26 08:00 | Alex M Pujolras v Giordan Kunz | 7-5,6-1 |
| ITF Egypt F29 | 2018/11/25 10:30 | Ali Zaghloul v Giordan Kunz | 2-6,1-6 |