| Challenger Milano | 06/24 15:30 | 24 | Sebastian Fanselow v Christopher Heyman | 7-5,7-6 | |
| Challenger Bratislava | 06/19 08:00 | 25 | [320] Sebastian Fanselow v Alexey Vatutin [206] | 4-6,4-6 | |
| Challenger Bratislava | 06/17 09:20 | 24 | [320] Sebastian Fanselow v Alex Molcan [330] | 7-6,6-3 | |
| Challenger Morelos | 02/19 18:00 | 25 | [338] Matias Franco Descotte v Sebastian Fanselow [304] | 6-4,6-2 | |
| Challenger Chennai | 02/05 06:05 | 25 | [293] Sasi Kumar Mukund v Sebastian Fanselow [308] | 6-3,6-1 | |
| Challenger Chennai | 02/04 06:40 | 24 | [368] Tung-Lin Wu v Sebastian Fanselow [308] | 4-6,5-7 | |
| Challenger Launceston | 01/28 03:15 | 24 | [251] Enrique L-Perez v Sebastian Fanselow [324] | 6-4,6-2 | |
| Challenger Burnie | 01/25 03:05 | 27 | [176] Kamil Majchrzak v Sebastian Fanselow [324] | 6-1,6-2 | |
| Challenger Burnie | 01/24 08:00 | 26 | [324] Sebastian Fanselow v Marc Polmans [169] | 3-6,6-4,7-6 | |
| Challenger Burnie | 01/22 02:00 | 25 | [226] Gian Marco Moroni v Sebastian Fanselow [324] | 6-4,4-6,2-6 | |
| Challenger Burnie | 01/21 01:25 | 24 | [324] Sebastian Fanselow v Tsung-Hua Yang [283] | 6-4,6-3 | |
| Challenger Da Nang | 01/09 07:00 | 26 | [414] Gerard Granollers v Sebastian Fanselow [321] | Retired | |
| Challenger Da Nang | 01/08 11:10 | 25 | [432] Nam Hoang Ly v Sebastian Fanselow [321] | 6-1,1-6,3-6 | |
| Challenger Pune | 11/22 08:30 | 27 | [397] Sebastian Fanselow v Elias Ymer [132] | 7-5,3-6,4-6 | |
| Challenger Pune | 11/21 09:05 | 26 | [289] Max Purcell v Sebastian Fanselow [397] | 2-6,1-6 | |
| Challenger Pune | 11/20 07:45 | 25 | [254] Scott Griekspoor v Sebastian Fanselow [397] | 6-3,3-6,4-6 | |
| Challenger Pune | 11/19 06:30 | 54 | Mick Lescure v Sebastian Fanselow | 4-6,7-5,2-6 | |
| Challenger Pune | 11/18 10:05 | 46 | Chien-Hsun Lo v Sebastian Fanselow | 3-6,3-6 | |
| Challenger Pune | 11/17 10:50 | 45 | Dhruva Mulye v Sebastian Fanselow | 0-6,0-6 | |
| Challenger Bangalore | 11/14 10:30 | 26 | [431] Sebastian Fanselow v Prajnesh Gunneswaran [144] | 6-4,4-6,5-7 | |
| Challenger Bangalore | 11/13 07:20 | 25 | [431] Sebastian Fanselow v Zsombor Piros [391] | 7-6,6-4 | |
| Challenger Bangalore | 11/12 08:25 | 54 | Khumoyun Sultanov v Sebastian Fanselow | 7-5,4-6,1-6 | |
| Challenger Bangalore | 11/11 09:35 | 46 | [435] Sebastian Fanselow v Benjamin Hassan [409] | 6-7,6-3,6-4 | |
| Challenger Bangalore | 11/10 11:50 | 45 | Sebastian Fanselow v Manish Sureshkumar | 6-1,6-2 | |
| Challenger Canberra 2 | 10/29 23:00 | 25 | [412] Sebastian Fanselow v Yoshihito Nishioka [91] | 3-6,2-6 | |
| Challenger Traralgon | 10/26 01:50 | 27 | [433] Sebastian Fanselow v Alex Bolt [140] | 5-7,6-3,4-6 | |
| Challenger Traralgon | 10/24 01:40 | 26 | [191] Hiroki Moriya v Sebastian Fanselow [433] | 6-1,3-6,2-6 | |
| Challenger Traralgon | 10/22 02:20 | 25 | Sebastian Fanselow v Jacob Grills | 6-3,6-3 | |
| Challenger Fairfield | 10/12 19:00 | 27 | [423] Sebastian Fanselow v Casper Ruud [137] | 1-6,0-6 | |
| Challenger Fairfield | 10/10 19:50 | 26 | [210] Lucas Miedler v Sebastian Fanselow [423] | 4-6,1-6 |