Stadium: Court 2 Round: 14 Ground: Clay
| Challenger Salzburg | 2021/07/04 09:15 | Doumbia, Sadio v Erler, Alexander | 6-7,5-7 |
| Challenger - Aix en Provence | 2021/06/14 08:30 | Doumbia, Sadio v Oriol Roca Batalla | 1-6,4-6 |
| Challenger - Aix en Provence | 2021/06/13 08:30 | Nick Chappell v Doumbia, Sadio | 0-6,4-6 |
| Challenger - Split | 2021/04/04 12:50 | Doumbia, Sadio v Mirza Basic | 6-7,3-6 |
| Challenger Gran Canaria | 2021/03/01 11:00 | Filip Cristian Jianu v Doumbia, Sadio | 6-2,6-3 |
| Challenger Gran Canaria Qual | 2021/02/28 16:45 | Pol Martin Tiffon v Doumbia, Sadio | 6-7,6-4,6-7 |
| Challenger Gran Canaria | 2021/02/21 15:00 | Elmar Ejupovic v Doumbia, Sadio | 7-6,6-3 |
| Challenger - Cherbourg | 2021/02/07 11:00 | Doumbia, Sadio v Jonas Forejtek | 6-7,2-6 |
| Challenger Tulln | 2021/09/07 08:00 | Matteo Martineau v Jonas Forejtek | 2-6,6-7 |
| Challenger Tulln | 2021/09/06 08:00 | Matteo Martineau v Mate Valkusz | 7-5,1-6,6-4 |
| Challenger Tulln | 2021/09/05 09:00 | Matteo Martineau v Hampel, Lenny | 6-3,6-2 |
| ITF M25 Lesa | 2021/08/29 14:50 | Bega, Alessandro v Matteo Martineau | 5-7,6-2,2-6 |
| ITF M25 Lesa | 2021/08/27 19:00 | Thirouin, Jean v Matteo Martineau | 1-6,1-6 |
| ITF M25 Lesa | 2021/08/26 10:30 | Basso, Andrea v Matteo Martineau | 3-6,2-6 |
| ITF M25 Lesa | 2021/08/25 12:15 | Pietro Marino v Matteo Martineau | 1-6,4-6 |
| Luedenscheid, Germany | 2021/08/19 11:15 | Matteo Martineau v Camilo Ugo Carabelli | 4-6,6-7 |