Stadium: Court 8 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Jablonec Nad Nisou | 2019/05/20 09:00 | Danylo Kalenichenko v Piotr Grynkowski | 6-1,6-0 |
| ITF M15 Antalya | 2019/05/10 09:35 | Piotr Grynkowski v Max Houkes | 2-6,1-6 |
| ITF M15 Antalya | 2019/05/09 09:05 | Piotr Grynkowski v Matthew Dellavedova | 6-2,6-3 |
| ITF M15 Antalya | 2019/05/08 10:00 | Paul Woerner v Piotr Grynkowski | 7-6,3-6,5-7 |
| ITF M15 Antalya | 2019/05/07 07:15 | Piotr Grynkowski v Giordan Kunz | 6-2,6-3 |
| 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 Netanya | 2019/06/18 06:30 | Kento Yamada v Daniel Dudockin | 3-6,6-1,10-8 |
| ITF M15 Netanya | 2019/06/17 06:30 | Ben Jones v Kento Yamada | 2-6,4-6 |
| ITF M15 Akko | 2019/06/13 10:10 | Kento Yamada v Erik Crepaldi | 4-6,2-6 |
| ITF M15 Akko | 2019/06/12 12:30 | Andrea Picchione v Kento Yamada | 1-6,3-6 |
| ITF M15 Akko | 2019/06/10 07:00 | Gleb Blekher v Kento Yamada | 2-6,2-6 |
| ITF M15 Akko | 2019/06/10 07:00 | Kento Yamada v Tom Hands | 6-1,6-1 |
| ITF Spain F15 Qual | 2018/06/11 08:00 | Albert Roglan v Kento Yamada | 6-2,2-6,6-1 |
| ITF Spain F15 Qual | 2018/06/10 10:00 | Kento Yamada v Marcos N Gallardo | 6-2,6-1 |