Stadium: Central Round: 26 Ground: Hardcourt indoor
| Challenger Ortisei | 2021/11/10 17:00 | Mirza Basic v Quentin Halys | 7-6,6-3 |
| Challenger Ortisei | 2021/11/08 15:30 | Luca Nardi v Quentin Halys | 4-6,3-6 |
| Challenger Tenerife | 2021/11/04 10:30 | Andrey Kuznetsov v Quentin Halys | 6-3,7-6 |
| Challenger Tenerife | 2021/11/02 14:30 | Alexander Shevchenko v Quentin Halys | 7-6,4-6,2-6 |
| Challenger Ismaning | 2021/10/30 14:10 | Quentin Halys v Lukas Lacko | 1-6,6-7 |
| Challenger Ismaning | 2021/10/29 15:25 | Jonas Forejtek v Quentin Halys | 6-3,2-6,2-6 |
| Challenger Ismaning | 2021/10/28 13:35 | Ruben Bemelmans v Quentin Halys | 6-7,7-6,4-6 |
| Challenger Ismaning | 2021/10/25 13:15 | Daniel Masur v Quentin Halys | 4-6,7-5,3-6 |
| Davis Cup | 2021/11/28 09:00 | Nino Serdarusic v Fabian Marozsan | 6-4,6-4 |
| ATP Stockholm | 2021/11/09 13:00 | Botic Van De Zandschulp v Nino Serdarusic | 7-6,7-6 |
| ATP Stockholm | 2021/11/07 11:00 | Andrea Vavassori v Nino Serdarusic | 3-6,6-3,6-4 |
| ATP Stockholm | 2021/11/06 11:00 | Simon Freund v Nino Serdarusic | 1-6,7-6,3-6 |
| Challenger Bergamo | 2021/11/03 19:30 | Alex Molcan v Nino Serdarusic | 6-7,6-4,6-2 |
| Challenger Bergamo | 2021/11/01 09:00 | Nino Serdarusic v Nerman Fatic | 6-7,5-7 |
| Challenger Bergamo | 2021/10/31 11:10 | Nino Serdarusic v Zsombor Piros | 5-7,6-1,6-4 |
| ATP St Petersburg | 2021/10/25 14:00 | Nino Serdarusic v Sebastian Korda | 6-7,5-7 |