Stadium: Court 7 Round: 14 Ground: Clay
| Challenger Biella | 2021/05/03 10:40 | Hamad Medjedovic v Ruben Bemelmans | 7-5,7-6 |
| Challenger - Rooma | 2021/04/26 13:00 | Ruben Bemelmans v Federico Gaio | 6-3,3-6,2-6 |
| Challenger - Rooma | 2021/04/21 09:00 | Bernard Tomic v Ruben Bemelmans | 6-3,6-4 |
| Challenger - Cherbourg | 2021/02/14 14:00 | Ruben Bemelmans v Lukas Rosol | 6-4,6-4 |
| Challenger - Cherbourg | 2021/02/13 14:00 | Ruben Bemelmans v Arthur Rinderknech | 6-3,3-6,7-5 |
| Challenger - Cherbourg | 2021/02/12 10:30 | Michael Geerts v Ruben Bemelmans | 6-4,1-6,6-7 |
| Challenger - Cherbourg | 2021/02/11 11:15 | Ruben Bemelmans v Denis Istomin | 6-4,7-6 |
| Challenger - Cherbourg | 2021/02/10 10:00 | Ruben Bemelmans v Corentin Denolly | 3-6,6-1,6-4 |
| ATP Lyon | 2021/05/17 08:00 | Alessandro Giannessi v Kamil Majchrzak | 4-6,3-6 |
| ATP Lyon | 2021/05/16 09:40 | Peter Polansky v Alessandro Giannessi | 3-6,4-6 |
| Challenger - Heilbronn | 2021/05/12 13:15 | Alessandro Giannessi v Daniel Elahi Galan | 7-6,6-7,4-6 |
| Challenger - Heilbronn | 2021/05/10 15:40 | Alessandro Giannessi v Prajnesh Gunneswaran | 7-6,6-1 |
| Challenger Biella | 2021/05/04 08:00 | Alessandro Giannessi v Juan Pablo Varillas | 4-6,5-7 |
| Challenger - Rooma | 2021/05/01 12:45 | Alessandro Giannessi v Juan Manuel Cerundolo | 6-4,4-6,5-7 |
| Challenger - Rooma | 2021/04/30 11:20 | Alessandro Giannessi v Thanasi Kokkinakis | 7-5,3-6,7-5 |
| Challenger - Rooma | 2021/04/28 11:20 | Alessandro Giannessi v Jay Clarke | 6-2,6-4 |