Stadium: CC Round: 54 Ground: Clay
| ITF Poland F4 Qual | 2017/07/02 13:00 | Martins Rocens v Piotr Grynkowski | 4-6,2-6 |
| 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 Las Palmas | 2019/04/30 08:30 | Martins Rocens v Chanon Phunsawat | 4-6,3-6 |
| ITF M15 Las Palmas | 2019/04/29 11:00 | Martins Rocens v Alexander Romay | 6-2,6-2 |
| ITF M15 Reus | 2019/04/08 08:30 | Albert Roglan v Martins Rocens | 6-3,6-2 |
| ITF M15 Murcia | 2019/03/19 09:15 | Carlos Sanchez Jover v Martins Rocens | 7-5,6-1 |
| ITF Turkey F41 | 2018/12/18 06:00 | Martins Rocens v Lorenzo Vatteroni | 6-3,6-7,5-10 |
| ITF Turkey F41 | 2018/12/16 06:00 | Martins Rocens v Marcel Hornung | 6-2,6-4 |
| ITF Turkey F40 | 2018/12/08 06:00 | Gerard E Juan v Martins Rocens | 7-6,6-2 |
| ITF Finland F4 | 2018/11/11 09:00 | Kristjan Tamm v Martins Rocens | 6-4,6-4 |