ITF Italy F8 04/27 11:50 26 Daniel Altmaier v Julian Onken 6-2,6-3
ITF Italy F8 04/25 08:00 25 Julian Onken v Toby Martin 6-3,6-2
ITF Italy F8 Qual 04/23 07:30 54 Julian Onken v Andrea Palmese 6-2,6-2
ITF Italy F7 04/20 10:00 26 Enzo Couacaud v Julian Onken 6-3,4-6,6-1
ITF Italy F7 04/18 08:00 25 Leon Schutt v Julian Onken 3-6,1-6
ITF Italy F7 Qual 04/17 08:00 54 Julian Onken v Delf Gohlke 6-1,6-2
ITF Morocco F3 03/25 10:00 27 Steven Diez v Julian Onken 6-3,6-1
ITF Morocco F3 03/24 15:15 26 Yassine Idmbarek v Julian Onken Retired
ITF Morocco F3 03/24 09:30 25 Julian Onken v Bastian Malla 6-7,6-1,6-3
ITF Morocco F3 03/20 10:00 54 Julian Onken v Mohamed A Bellalouna 6-3,6-2
ITF Morocco F2 03/16 11:55 26 Julian Onken v Lamine Ouahab 2-6,4-6
ITF Morocco F2 03/15 11:05 25 Khalid Allouch v Julian Onken 1-6,6-7
ITF Morocco F2 03/13 15:00 62 Julian Onken v Tommaso Schold 6-7,6-2,6-1
ITF Morocco F2 03/13 10:00 62 Julian Onken v Ayoub Benamar 6-4,7-6
ITF Morocco F1 03/09 11:10 26 Jeremy Jahn v Julian Onken 6-1,6-2
ITF Morocco F1 03/07 11:00 25 Fabio Mercuri v Julian Onken 2-6,1-6
ITF Turkey F6 02/08 08:00 62 Julian Onken v Philip Wilbert Major 4-6,0-6
ITF Turkey F5 01/30 10:00 62 Julian Onken v Changwei Peng 6-1,6-0
ITF Turkey F47 11/07 06:00 62 Julian Onken v Kento Yamada 3-6,1-6
ITF Turkey F44 11/03 09:45 25 Julian Onken v Tomislav Brkic 6-7,3-6
ITF Italy F32 10/20 11:45 25 Julian Onken v Walter Trusendi 3-6,3-6
ITF Italy F32 Qual 10/17 07:00 54 Julian Onken v Nicolas Parizzia 6-4,6-1
ITF Italy F31 10/14 10:15 26 Julian Onken v Riccardo Bonadio 6-3,1-6,2-6
ITF Italy F31 10/13 09:55 25 Gian Marco Moroni v Julian Onken 6-2,3-6,0-6
ITF Italy F31 Qual 10/12 07:00 54 Julian Onken v Giovanni Fonio 6-2,5-7,7-6
ITF Poland F5 09/07 11:50 25 Ondrej Krstev v Julian Onken 6-2,5-7,6-3
ITF Poland F4 Qual 08/31 09:30 62 Mikolaj Jedruszczak v Julian Onken 7-5,6-0
ITF Poland F4 Qual 08/30 07:30 62 Dominik Nazaruk v Julian Onken 2-6,0-6
ITF Germany F12 08/20 13:10 26 Julian Onken v Vladyslav Manafov 4-6,1-6
ITF Germany F12 08/19 11:00 25 Julian Onken v Francois-Arthur Vibert 6-3,0-6,7-6