ITF Turkey F23 MD 06/09 10:50 26 Ruppli, Andrew v Sieber, Marc 1-6,0-6
ITF Turkey F23 MD 06/08 11:30 25 Paul Woerner v Sieber, Marc 2-6,0-6
ITF Turkey F22 06/05 11:30 29 Scholtz, Nicolaas v Sieber, Marc 0-6,1-6
ITF Turkey F22 06/04 11:30 28 de Paula, Fabiano v Sieber, Marc 3-6,0-6
ITF Turkey F22 06/03 11:30 27 Fortuna, Claudio v Sieber, Marc 1-6,2-6
ITF Turkey F22 06/02 13:30 26 Pervolarakis, Michail v Sieber, Marc 4-6,4-6
ITF Turkey F22 05/31 11:30 25 Ruppli, Andrew v Sieber, Marc 3-6,1-6
ITF Turkey F19 05/14 09:35 28 Dennis Novak v Sieber, Marc 6-4,6-7,6-2
ITF Turkey F19 05/13 09:20 27 Sieber, Marc v Oku, Hiromasa 6-0,6-3
ITF Turkey F18 05/08 08:00 29 Dennis Novak v Sieber, Marc 6-2,6-2
ITF Turkey F18 05/07 08:00 28 Sieber, Marc v Hugo Nys 1-6,6-3,6-2
ITF Turkey F18 05/06 08:00 27 Nagao, Katsuki v Sieber, Marc 3-6,6-4,2-6
ITF Turkey F18 05/05 09:30 26 Numajiri, Keisuke v Sieber, Marc 0-6,2-6
Turkey F17, Singles Qualifying 05/01 11:00 29 Sieber, Marc v Heyman, Christopher 6-3,6-0
Turkey F17, Singles Qualifying 04/30 11:00 28 Kishi, Ryota v Sieber, Marc 0-6,5-7
Turkey F17, Singles Qualifying 04/29 11:00 27 Boutillier, Remi v Sieber, Marc 6-7,1-6
Turkey F17, Singles Qualifying 04/28 08:00 26 Issei Okamura v Sieber, Marc 7-5,2-6,0-6
Turkey F17, Singles Qualifying 04/26 11:20 25 Nagao, Katsuki v Sieber, Marc 2-6,1-6
Turkey F15, Singles Qualifying 04/17 09:00 29 Sieber, Marc v Cem Ilkel 2-6,6-4,6-4
Turkey F15, Singles Qualifying 04/15 08:00 27 David Pichler v Sieber, Marc 4-6,1-6
Turkey F15, Singles Qualifying 04/14 09:35 26 Cho, Hyeong Jin v Sieber, Marc 1-6,1-6
Turkey F15, Singles Qualifying 04/13 07:00 25 Sieber, Marc v Botzer, Bar Tzuf 7-5,7-5
Turkey F14, Singles Qualifying 04/10 08:00 29 Sieber, Marc v Sebastian Ofner 5-7,7-5,6-3
Turkey F14, Singles Qualifying 04/09 08:00 28 Sieber, Marc v Michael Geerts 6-3,6-2
Turkey F14, Singles Qualifying 04/08 08:00 27 Mugevicius, Lukas v Sieber, Marc 4-6,4-6
Turkey F14, Singles Qualifying 04/07 07:00 26 Suluoglu, Sefa v Sieber, Marc 2-6,0-6
Turkey F14, Singles Qualifying 04/06 07:00 25 Sieber, Marc v Botzer, Bar Tzuf 7-5,6-4
ITF Turkey F13 04/02 10:30 28 Cem Ilkel v Sieber, Marc 1-6,6-3,6-2
ITF Turkey F13 04/01 08:00 27 Sieber, Marc v Urbanija, Mike 6-1,6-2
ITF Turkey F13 03/31 07:00 26 Sieber, Marc v Vit Kopriva 6-4,0-6,6-1