Stadium: Court 1 Round: 25 Ground: Clay
| Challenger - Lüdenscheid | 2021/08/16 09:30 | Dayne Kelly v Matteo Martineau | 2-6,3-6 |
| Challenger - Lüdenscheid | 2021/08/15 11:00 | Matteo Martineau v Adrian Andreev | 6-4,7-5 |
| Challenger - San Marino | 2021/08/08 08:00 | Manuel Mazza v Matteo Martineau | 6-1,3-6,6-3 |
| Challenger - Pozoblanco | 2021/07/20 15:00 | Matteo Martineau v Teymuraz Gabashvili | 4-6,6-1,4-6 |
| Challenger - Pozoblanco | 2021/07/19 15:00 | Matteo Martineau v Federico Zeballos | 6-2,6-3 |
| Challenger - Pozoblanco | 2021/07/18 15:30 | Matteo Martineau v Antonio Prat | 6-0,6-7,6-2 |
| Challenger - Iași | 2021/07/11 07:00 | Matteo Martineau v Vlad Andrei Dancu | 3-6,6-7 |
| ITF - M25 Bourg-en-Bresse | 2021/07/03 15:30 | Franco Agamenone v Matteo Martineau | 6-4,2-6,6-4 |
| Challenger - Meerbusch | 2021/08/09 09:30 | Jesper De Jong v Marvin Moeller | 6-1,6-4 |
| Challenger - Meerbusch | 2021/08/08 09:10 | Marvin Moeller v Benjamin Hassan | 5-7,7-5,6-3 |
| ITF M25 - Wetzlar | 2021/08/04 08:00 | Marvin Moeller v Peter Heller | 2-6,3-6 |
| Challenger Braunschweig | 2021/07/10 09:00 | Daniel Altmaier v Marvin Moeller | 7-5,6-0 |
| Challenger Braunschweig | 2021/07/08 13:00 | Marvin Moeller v Benjamin Hassan | 6-4,6-2 |
| Challenger Braunschweig | 2021/07/07 09:30 | Sumit Nagal v Marvin Moeller | 3-6,6-1,2-6 |
| Challenger Braunschweig | 2021/07/06 10:30 | Marvin Moeller v Teymuraz Gabashvili | 7-5,6-3 |
| ITF M25 - Wrocław | 2021/06/28 09:30 | Marvin Moeller v Matej Galik | 6-3,6-7,11-13 |