Stadium: Court 1 Round: 25 Ground: Clay
| ITF Poland F2 | 2017/06/18 08:30 | Piotr Grynkowski v Szymon Walkow | 1-6,6-3,3-6 |
| Challenger Sopot Qual | 2018/07/29 12:20 | Szymon Walkow v Vladyslav Manafov | 3-6,2-6 |
| Challenger Sopot Qual | 2018/07/28 09:00 | Franco Agamenone v Szymon Walkow | 3-6,6-2,2-6 |
| ITF Czech Republic F3 | 2018/05/29 12:15 | Szymon Walkow v Mateusz Terczynski | 4-6,4-6 |
| ITF Czech Republic F3 Qual | 2018/05/27 09:00 | Szymon Walkow v Adam Blecha | 6-1,7-5 |
| ITF Czech Republic F2 | 2018/05/23 08:00 | Szymon Walkow v Sekou Bangoura | 2-6,5-7 |
| ITF Italy F9 | 2018/04/21 12:00 | Giovanni Rizzuti v Szymon Walkow | 6-1,6-2 |
| ITF Great Britain F2 | 2018/02/05 12:30 | Ben Jones v Szymon Walkow | 6-4,7-6 |
| ITF Great Britain F2 | 2018/02/04 18:15 | Emile Hudd v Szymon Walkow | 2-6,5-7 |
| ITF Ireland F1 Qual | 2018/07/30 09:30 | Piotr Grynkowski v Jonathan Binding | 4-6,2-6 |
| ITF Czech Republic F5 Qual | 2018/07/02 10:00 | Piotr Grynkowski v Antonin Stepanek | 2-6,0-6 |
| ITF Czech Republic F5 Qual | 2018/07/01 08:00 | Piotr Grynkowski v Michal Skonieczny | 6-2,6-3 |
| ITF Poland F4 | 2018/05/22 08:55 | Pawel Juszczak v Piotr Grynkowski | 6-2,6-3 |
| ITF Poland F4 | 2018/05/21 07:00 | Piotr Grynkowski v Ramy Labna | 6-3,7-6 |
| ITF Poland F2 | 2018/05/06 08:00 | Janis Podzus v Piotr Grynkowski | 7-5,7-5 |
| ITF Poland F2 | 2018/05/05 12:30 | Noe Sytkow v Piotr Grynkowski | 2-6,7-6,1-6 |
| ITF Poland F1 | 2018/05/03 09:00 | Guy Den Heijer v Piotr Grynkowski | 6-1,6-2 |