Stadium: Center Court Round: 25 Ground: Hardcourt indoor
| Challenger Biel | 2021/09/25 11:15 | Marc-Andrea Huesler v Tim Van Rijthoven | 3-6,7-6,6-4 |
| Challenger Biel | 2021/09/24 16:00 | Tim Van Rijthoven v Joao Sousa | 7-6,6-4 |
| Challenger Biel | 2021/09/22 13:10 | Dennis Novak v Tim Van Rijthoven | 7-6,3-6,6-7 |
| Challenger Biel | 2021/09/21 09:00 | Tim Van Rijthoven v Hiroki Moriya | 6-1,6-3 |
| Challenger Rennes | 2021/09/14 11:40 | Gregoire Barrere v Tim Van Rijthoven | 7-6,7-5 |
| Challenger Barletta | 2021/08/25 09:00 | Tim Van Rijthoven v Flavio Cobolli | 1-6,2-6 |
| Challenger Barletta | 2021/08/23 14:05 | Tim Van Rijthoven v Emiliano Maggioli | 7-5,6-4 |
| Challenger Verona | 2021/08/17 08:30 | Teymuraz Gabashvili v Tim Van Rijthoven | 6-7,6-2,7-6 |
| Challenger Losinj | 2021/10/21 10:40 | Nerman Fatic v Georgii Kravchenko | 6-3,2-6,6-3 |
| Challenger Losinj | 2021/10/19 11:45 | Georgii Kravchenko v Blaz Rola | 6-4,6-2 |
| Challenger Losinj | 2021/10/18 08:00 | Georgii Kravchenko v Anirudh Chandrasekar | 6-0,6-1 |
| Challenger Losinj | 2021/10/17 09:25 | Georgii Kravchenko v Gal Emersic Potocnik | 6-2,6-2 |
| Challenger Alicante | 2021/10/12 11:40 | Georgii Kravchenko v Mario Vilella Martinez | 3-6,2-6 |
| Challenger Alicante | 2021/10/11 09:00 | Robert Galloway v Georgii Kravchenko | 6-4,1-6,2-6 |
| Challenger Alicante | 2021/10/10 09:35 | Luis Patino v Georgii Kravchenko | 2-6,1-6 |
| Challenger Barcelona | 2021/10/05 11:20 | Georgii Kravchenko v Damir Dzumhur | 6-3,3-6,1-6 |