| ITF Kazakhstan F5 Qual | 04/23 05:00 | 44 | Beck, Karol v Dernowski, Dietrich | 6-3,6-1 | |
| ITF Kazakhstan F5 Qual | 04/22 06:20 | 44 | Dernowski, Dietrich v Nagimetov, Sundet | 6-3,6-4 | |
| ITF Kazakhstan F5 Qual | 04/21 06:00 | 44 | ディダロフ,ディダル v Dernowski, Dietrich | 0-6,0-6 | |
| ITF Kazakhstan F4 Qual | 04/14 07:00 | 44 | Terzyan, Rafik v Dernowski, Dietrich | 6-2,7-5 | |
| ITF Kazakhstan F3 Qual | 04/08 14:10 | 44 | パヴリョチェンコフ,アレクサンダー v Dernowski, Dietrich | 7-5,6-3 | |
| ITF Kazakhstan F3 Qual | 04/08 07:30 | 44 | Dernowski, Dietrich v ベイベコフ,ダニス | 6-0,7-6 | |
| Turkey F12, Singles Qualifying | 03/24 06:30 | 62 | パラゾフ,ズラタン v Dernowski, Dietrich | 6-2,6-4 | |
| ITF Turkey F11 | 03/17 08:30 | 62 | Labna, Ramy v Dernowski, Dietrich | 6-2,6-0 | |
| ITF USA F6 | 01/27 14:00 | 60 | Bhatnagar, Malik v Dernowski, Dietrich | 6-4,6-0 | |
| ITF Kazakhstan F7 Qual | 09/25 04:00 | 44 | ツォイ,パヴェル v Dernowski, Dietrich | 6-1,6-2 | |
| ITF Kazakhstan F7 Qual | 09/24 09:40 | 44 | Anvarkhodjaev, Islom v Dernowski, Dietrich | 1-6,1-6 | |
| ITF Kazakhstan F6 | 09/19 08:05 | 25 | Dernowski, Dietrich v フュフィギン,ミハイル | 5-7,3-6 | |
| ITF Kazakhstan F6 Qual | 09/18 04:30 | 44 | Kolobaev, Nikolay v Dernowski, Dietrich | 6-3,2-6,6-0 | |
| ITF Kazakhstan F6 Qual | 09/17 08:30 | 44 | ボルマ,ペッレ v Dernowski, Dietrich | 4-6,5-7 | |
| ITF Turkey F34 | 09/09 10:30 | 44 | Dernowski, Dietrich v Iordache, Sorin Andrei | 2-6,0-6 | |
| ITF Turkey F33 | 09/02 11:00 | 62 | サヴリヤン・ダニロフ v Dernowski, Dietrich | 6-2,7-5 | |
| ITF Turkey F32 | 08/28 12:30 | 44 | Dernowski, Dietrich v ルチ,ヴィタル・フルリン | 2-6,3-6 | |
| ITF Turkey F32 | 08/27 12:30 | 44 | Dernowski, Dietrich v Valentsev, Nikita | 2-6,6-4,6-1 | |
| ITF Spain F25 | 08/14 09:30 | 44 | Sorni Chavarria, Quim v Dernowski, Dietrich | 6-2,6-3 | |
| ITF Spain F25 | 08/13 10:00 | 44 | ニコラス・ガルシア・トーレアルバ v Dernowski, Dietrich | 4-6,3-6 | |
| ITF Spain F23 Qual | 07/22 09:15 | 62 | Klimov, Daniil v Dernowski, Dietrich | 6-3,6-1 | |
| ITF Spain F22 Qual | 07/17 09:35 | 62 | ナイト,アレクサンダー v Dernowski, Dietrich | 6-4,7-6 | |
| ITF Spain F21 Qual | 07/10 09:30 | 62 | Garcia Saez, Alejandro v Dernowski, Dietrich | 4-6,6-1,7-5 | |
| ITF Spain F21 Qual | 07/09 09:00 | 62 | ミケル・アランザバル v Dernowski, Dietrich | 2-6,6-4,3-6 | |
| ITF Spain F21 Qual | 07/08 11:00 | 62 | ポル・マルティン・ティフォン v Dernowski, Dietrich | 6-2,4-6,5-7 | |
| ITF Romania F5 | 06/25 11:00 | 62 | パタ・ダビド v Dernowski, Dietrich | 7-5,7-6 | |
| ITF Romania F5 | 06/24 14:00 | 62 | アブルダン・イヨアン・ダン v Dernowski, Dietrich | Retired | |
| ITF Romania F4 | 06/18 09:00 | 62 | カリン マンダ v Dernowski, Dietrich | 6-2,6-1 | |
| ITF Spain F16 Qual | 06/03 14:30 | 54 | フアレス・カロ,ホセ v Dernowski, Dietrich | 7-6,6-4 | |
| ITF Tunisia F20 | 05/24 11:25 | 25 | フィリッポ・バルディ v Dernowski, Dietrich | 6-0,6-0 |