| Challenger - Forlì | 06/15 09:30 | 25 | [392] Sebastian Fanselow v Camilo Ugo Carabelli [300] | 2-6,2-6 | |
| Challenger - Forlì | 06/14 09:30 | 19 | [392] Sebastian Fanselow v Luca Vanni [433] | 2-6,6-2,7-5 | |
| Challenger - Forlì | 06/13 12:20 | 14 | Sebastian Fanselow v Antoine Bellier | 6-3,6-4 | |
| Challenger - Orlando | 06/06 14:00 | 14 | [340] Thiago Agustin Tirante v Sebastian Fanselow [402] | 6-2,3-6,6-4 | |
| Challenger - Little Rock | 05/31 15:00 | 19 | [462] Alexis Galarneau v Sebastian Fanselow [402] | 3-6,6-3,6-4 | |
| Challenger - Little Rock | 05/30 15:00 | 14 | [476] Michail Pervolarakis v Sebastian Fanselow [399] | 4-6,5-7 | |
| ITF M15 - Troisdorf | 05/15 13:25 | 28 | [448] Elmar Ejupovic v Sebastian Fanselow [408] | 7-6,6-4 | |
| ITF M15 - Troisdorf | 05/14 16:10 | 27 | [475] Louis Wessels v Sebastian Fanselow [408] | 4-6,5-7 | |
| ITF M15 - Troisdorf | 05/13 13:25 | 26 | Marvin Netuschil v Sebastian Fanselow | 2-6,1-6 | |
| ITF M15 - Troisdorf | 05/11 11:00 | 25 | Maximilian Dietel v Sebastian Fanselow | 0-6,1-6 | |
| ITF M15 - Majadahonda | 05/06 10:40 | 26 | [378] Matteo Martineau v Sebastian Fanselow [408] | 6-1,7-6 | |
| ITF M15 - Majadahonda | 05/05 09:00 | 25 | Ignacio B Alia v Sebastian Fanselow | 2-6,0-6 | |
| ITF M25 - Angers | 04/22 13:30 | 26 | Alvaro Lopez San Martin v Sebastian Fanselow | 2-6,6-1,6-4 | |
| ITF M25 - Angers | 04/21 15:05 | 25 | [410] Sebastian Fanselow v Nikolas S Izquierdo [343] | 6-2,7-5 | |
| ITF - M25 La Nucia | 03/19 14:05 | 26 | [436] Sebastian Fanselow v Raul Brancaccio [361] | 6-7,0-6 | |
| ITF - M25 La Nucia | 03/17 09:00 | 25 | Sebastian Fanselow v Pol Toledo Bague | Retired | |
| ITF M25 - Vale Do Lobo | 03/14 11:30 | 29 | [321] Kaichi Uchida v Sebastian Fanselow [435] | 5-7,7-6,7-6 | |
| ITF M25 - Vale Do Lobo | 03/13 13:20 | 28 | Sebastian Fanselow v Tak Khunn Wang | 6-1,6-3 | |
| ITF M25 - Vale Do Lobo | 03/12 10:30 | 27 | Sebastian Fanselow v Pedro Araujo | 6-2,7-6 | |
| ITF M25 - Vale Do Lobo | 03/11 16:05 | 26 | Bradley Paliska v Sebastian Fanselow | 2-6,2-6 | |
| ITF M25 - Vale Do Lobo | 03/10 13:20 | 25 | Fabio Coelho v Sebastian Fanselow | 1-6,4-6 | |
| ITF M25 - Vale Do Lobo | 03/10 13:10 | 25 | Alen Avidzba v Sebastian Fanselow | Cancelled | |
| ITF M25 Faro | 03/04 11:20 | 26 | Sebastian Fanselow v Tomas Lipovsek Puches | 3-6,6-3,6-7 | |
| ITF M25 Faro | 03/03 09:30 | 25 | Sebastian Fanselow v Fabio Coelho | 6-2,6-3 | |
| ITF M25 - Vale Do Lobo | 02/25 12:55 | 26 | Kenny de Schepper v Sebastian Fanselow | 2-6,7-5,6-1 | |
| ITF M25 - Vale Do Lobo | 02/24 17:00 | 25 | Antoine Bellier v Sebastian Fanselow | 4-6,3-6 | |
| ITF - M15 Grenoble | 02/11 12:25 | 26 | Sebastian Fanselow v Dominic Stephan Stricker | 4-6,5-7 | |
| ITF - M15 Grenoble | 02/10 09:30 | 25 | Sebastian Fanselow v Tak Khunn Wang | 2-6,6-4,6-4 | |
| ITF M25 - Villena | 02/03 10:25 | 25 | [426] Sebastian Fanselow v Tim Van Rijthoven [347] | 4-6,6-7 | |
| ITF M15 - Bressuire | 01/19 09:30 | 25 | [339] Jelle Sels v Sebastian Fanselow [422] | 6-3,7-6 |