Stadium: Court 1 Round: 25 Ground: Clay
| Challenger Fairfield | 2018/10/09 17:00 | Sebastian Fanselow v Cem Ilkel | 6-2,5-7,6-0 |
| Challenger Yokkaichi | 2023/11/28 01:00 | Cem Ilkel v Moez Echargui | 4-6,5-7 |
| Challenger Yokohama | 2023/11/21 01:00 | Marc Polmans v Cem Ilkel | 6-1,6-0 |
| ATP Sofia | 2023/11/09 13:15 | Jack Draper v Cem Ilkel | 6-2,6-2 |
| ATP Sofia | 2023/11/08 14:40 | Cem Ilkel v Max Purcell | 6-3,4-6,6-4 |
| ATP Sofia | 2023/11/07 18:15 | Cem Ilkel v Dimitar Kuzmanov | 6-0,6-3 |
| Challenger Bergamo | 2023/11/02 16:15 | Cem Ilkel v Pierre-Hugues Herbert | 1-6,1-6 |
| Challenger Bergamo | 2023/10/31 18:30 | Cem Ilkel v Illya Marchenko | 6-7,6-4,7-5 |
| Challenger Hamburg | 2023/10/19 15:05 | Cem Ilkel v Billy Harris | 6-7,1-6 |
| Challenger Maia | 2023/11/28 12:15 | Sebastian Fanselow v Karl Friberg | 6-3,3-6,4-6 |
| Challenger Champaign | 2023/11/16 18:20 | Sebastian Fanselow v Alex Michelsen | 3-6,2-6 |
| Challenger Champaign | 2023/11/15 00:15 | Aidan Mchugh v Sebastian Fanselow | 2-6,6-4,3-6 |
| Challenger Knoxville | 2023/11/09 16:00 | Zachary Svajda v Sebastian Fanselow | 6-2,7-5 |
| Challenger Knoxville | 2023/11/07 21:40 | Sebastian Fanselow v Cannon Kingsley | 6-4,6-2 |
| Challenger Knoxville | 2023/11/06 17:35 | Sebastian Fanselow v Alex Rybakov | 6-7,6-4,6-4 |
| Challenger Knoxville | 2023/11/05 19:00 | Sebastian Fanselow v Kyle Kang | 6-3,6-3 |
| Challenger Charlottesville | 2023/10/30 15:50 | Sebastian Fanselow v Darian King | 3-6,2-6 |