Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Sunrise | 2019/04/08 15:00 | Alexander Knight v Gabriel Donev | 6-4,6-3 |
| ITF M15 Cancun | 2019/03/27 16:30 | Gabriel Donev v Andrew Watson | 0-6,2-6 |
| ITF M15 Cancun | 2019/03/25 19:00 | George Botezan v Gabriel Donev | 2-6,2-6 |
| ITF M15 Cancun | 2019/03/25 17:00 | Wilfredo Gonzalez v Gabriel Donev | 2-6,6-3,8-10 |
| ITF M15 Cancun | 2019/03/18 18:30 | Maksim Tikhomirov v Gabriel Donev | 6-2,6-2 |
| ITF M15 Cancun | 2019/03/18 14:30 | Matt McBride v Gabriel Donev | 6-4,4-6,8-10 |
| ITF M15 Antalya | 2019/02/18 07:00 | Alexander Weis v Gabriel Donev | 6-2,6-0 |
| ATP Sofia | 2019/02/03 14:05 | Sergiy Stakhovsky v Gabriel Donev | 6-1,6-2 |
| ITF M25 Santa Margherita | 2019/04/15 12:00 | Victor Vlad Cornea v Patrik Hartmeier | 6-1,6-2 |
| ITF M25 Sunderland | 2019/04/08 16:00 | Patrik Hartmeier v Anton Matusevich | 4-6,1-6 |
| ITF M25 Sunderland | 2019/04/08 08:40 | Patrik Hartmeier v James Mackinlay | 7-5,3-6,10-8 |
| ITF M15 Oslo | 2019/03/05 09:00 | Jordan Hasson v Patrik Hartmeier | 7-6,3-6,10-8 |
| ITF M15 Oslo | 2019/03/04 09:00 | Daniil Glinka v Patrik Hartmeier | 6-4,3-6,2-10 |
| ITF M25 Oberentfelden | 2019/02/04 08:30 | Mattia Bellucci v Patrik Hartmeier | 6-1,2-6,10-5 |
| ITF M25 Nussloch | 2019/01/21 13:45 | Andrew Watson v Patrik Hartmeier | 6-2,6-1 |
| ITF Czech Republic F12 | 2018/11/27 09:00 | Patrik Hartmeier v Jiri Barnat | 2-6,2-6 |