Stadium: Center Court Round: 25 Ground: Carpet indoor
| Challenger - Ismaning | 2021/10/28 13:35 | Ruben Bemelmans v Quentin Halys | 6-7,7-6,4-6 |
| Challenger - Ismaning | 2021/10/27 12:20 | Henri Squire v Ruben Bemelmans | 3-6,4-6 |
| Challenger - Mouilleron le Captif | 2021/10/04 16:00 | Ruben Bemelmans v Constant Lestienne | 3-6,6-3,5-7 |
| Challenger - Orleans | 2021/10/01 11:55 | Dennis Novak v Ruben Bemelmans | 7-6,7-6 |
| Challenger - Orleans | 2021/09/30 11:35 | Ruben Bemelmans v Pierre-Hugues Herbert | 3-6,7-5,6-4 |
| Challenger - Orleans | 2021/09/28 08:30 | Joao Sousa v Ruben Bemelmans | 4-6,6-4,4-6 |
| Challenger - Biel | 2021/09/22 10:45 | Ruben Bemelmans v Marc-Andrea Huesler | 3-6,6-3,6-7 |
| Davis Cup | 2021/09/19 19:45 | Murkel Dellien v Ruben Bemelmans | 6-7,2-6 |
| Challenger - Eckental | 2021/11/01 11:55 | Tobias Simon v Peter Heller | 6-2,6-4 |
| Challenger - Eckental | 2021/10/31 11:55 | Otto Virtanen v Tobias Simon | 1-6,4-6 |
| ITF M25 - Sarreguemines | 2021/10/26 11:55 | Arthur Bouquier v Tobias Simon | 7-5,6-4 |
| ITF M25 - Toulouse | 2021/10/21 09:00 | Axel Garcian v Tobias Simon | 3-6,6-2,6-1 |
| ITF M25 - Toulouse | 2021/10/19 13:55 | Dane Sweeny v Tobias Simon | 6-7,5-7 |
| ITF M25 - Prag | 2021/10/09 08:30 | Tobias Simon v David Poljak | 6-7,4-6 |
| ITF M25 - Prag | 2021/10/08 11:10 | Tobias Simon v Uladzimir Ignatik | 2-6,7-6,6-4 |
| ITF M25 - Prag | 2021/10/07 14:05 | Tobias Simon v Milos Karol | 6-4,4-6,7-6 |